Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
408 results · page 1 of 9
Oct 27, 2026A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user.CVE-2026-87897 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.6
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT authentication token for another user when they start a recording, which then enables the attacker read/write access to the victim's Whiteboard.
- Product
- whiteboard
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The user in a group can bypass the group restriction set by an administrator on link sharing, creating share links for a table even though they shouldn't have tCVE-2026-82986 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.6
The user in a group can bypass the group restriction set by an administrator on link sharing, creating share links for a table even though they shouldn't have that permission.
- Product
- Tables
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resCVE-2026-82984 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.3
When a team was configured as "visible to everyone", the web UI correctly blocked non-members from viewing the team ("You are not a member of ..."), but the resources API endpoint could still be called directly, allowing any authenticated non-member to enumerate the team's internal resources and their identifiers. This does not grant access to the contents of the discovered resources themselves, only their existence, names, and identifiers.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting user has manage-level permission on the tablCVE-2026-82983 · Other software · Nextcloud · reported by support@hackerone.comLow 3.3
The Tables app's share-listing endpoint (GET /apps/tables/share/table/{tableId}) did not verify that the requesting user has manage-level permission on the table before returning the full list of share recipients (users, groups, and teams) along with their permission levels. A user who was only granted read-data access to a table, and who is correctly prevented from seeing this information in the web UI, could call the endpoint directly to enumerate everyone the table is shared with and their access levels. This does not expose the table's data itself beyond what the read-data grant already permits, only the list of share recipients and their permission levels.
- Product
- Tables
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidenCVE-2026-77173 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.3
A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidential.
- Product
- Files Confidential
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026App passwords were allowed to bypass password confirmation on sensitive endpoints.CVE-2026-77172 · Other software · Nextcloud · reported by support@hackerone.comMedium 5.3
App passwords were allowed to bypass password confirmation on sensitive endpoints.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026A public shared collective always allowed recipients of the link to create pages.CVE-2026-77171 · Other software · Nextcloud · reported by support@hackerone.comLow 3.5
A public shared collective always allowed recipients of the link to create pages.
- Product
- Collectives
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table.CVE-2026-77167 · Other software · Nextcloud · reported by support@hackerone.comHigh 7.5
Abusing the federated share endpoint, an attacker can write arbitrary rows into the oc_share_external database table. These rows persist indefinitely — there is no automatic cleanup mechanism. Three distinct denial-of-service conditions follow from this write primitive, all triggered from the same unauthenticated source and all self-renewing on a 24-hour cycle for as long as the injected rows remain in the database.
- Product
- server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026A missing token type check allowed to retrieve more additional information about the WOPI configuration with a user or guest token.CVE-2026-67400 · Other software · Nextcloud · reported by support@hackerone.comLow 3.5
A missing token type check allowed to retrieve more additional information about the WOPI configuration with a user or guest token.
- Product
- Richdocuments
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The 3D Viewer for Nextcloud is a comprehensive 3D model viewer application for Nextcloud that supports multiple 3D file formats.CVE-2026-104189 · Other software · maz1987in · reported by GitHubHigh 7.5
The 3D Viewer for Nextcloud is a comprehensive 3D model viewer application for Nextcloud that supports multiple 3D file formats. In versions 1.7.9 through 3.3.1, the app's public file endpoint performed no share authorization. Anyone who knows a share token could read the shared file's contents even when the link share was protected by a password. `PublicFileController` extended `OCP\AppFramework\Controller` and marked its routes `#[PublicPage]`. Nextcloud only enforces share passwords through `PublicShareMiddleware`, which returns early for any controller that is not an `OCP\AppFramework\PublicShareController` instance — so no password, expiry, or share-type check ran for these routes. `ShareFileService::loadLinkShare()` compounded this by treating any token that `getShareByToken()` matched as authorised. A share token is the part of the URL that people paste into chats, emails, and tickets. Password protection exists precisely for the case where holding the token should not by itself grant access, and that guarantee did not hold. Requests to `GET /ocs/v2.php/apps/threedviewer/public/file/{token}/{fileId}` returned `200` with the full file body for password-protected shares, with
- Product
- 3Dviewer-Nextcloud
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 21, 2026The emoji field in the page emoji update endpoint does not properly validate user input.CVE-2026-77166 · Other software · Nextcloud · reported by support@hackerone.comLow 2.4
The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
- Product
- Collectives
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordhackerone.comhackerone.com
Sep 21, 2026File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.CVE-2026-77165 · Other software · Nextcloud · reported by support@hackerone.comMedium 6.5
File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordhackerone.comhackerone.com
Sep 17, 2026The Photos app's filter-based "smart albums" build their file listing using the search configuration (photosSourceFolders) of the user viewing the album, ratherCVE-2026-82985 · Other software · Nextcloud · reported by support@hackerone.comMedium 6.5
The Photos app's filter-based "smart albums" build their file listing using the search configuration (photosSourceFolders) of the user viewing the album, rather than the album owner's configuration. When an album owner shares a smart album with another user, that user's own folder configuration is used to determine which of the owner's files are searched — allowing them to discover files (name, file ID, and other metadata) in folders the album owner never intended to include in the shared album. This requires the album owner to have shared a filter-based smart album with the attacker; it does not allow access to arbitrary users' files without such a share.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing an approver from approving or rejecting CVE-2026-82982 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.3
The Approval app's approve/reject endpoint is meant to require the file's current etag as a freshness check, preventing an approver from approving or rejecting a file whose contents changed after they reviewed it. The backend only enforced this check when the etag parameter was present and non-empty in the request. An attacker able to intercept and modify the approval request could omit the etag field entirely, bypassing the freshness check and approving or rejecting a file version they never reviewed.
- Product
- Approval
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users.CVE-2026-82980 · Other software · Nextcloud · reported by support@hackerone.comMedium 6.3
Any authenticated user can lock or unlock files they do not own by targeting absolute WebDAV paths of other users. The DAV plugin resolves files from the absolute request URI without verifying that the path segment matches the authenticated session user. This enables: Cross-user manual locks : attacker locks a victim's files, blocking writes (PUT/MOVE/DELETE, editor saves). Lock-token disclosure: the app returns the lock token to unauthorized callers, enabling them to remove token-based locks (client locks) of other users.
- Product
- Files Lock
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has peCVE-2026-77170 · Other software · Nextcloud · reported by support@hackerone.comMedium 4.3
The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board.
- Product
- Deck
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators CVE-2026-77169 · Other software · Nextcloud · reported by support@hackerone.comMedium 6.5
A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators to bypass folder-level authorization controls. The workspace app enables organizations to delegate limited administrative privileges for team folder management via API/REST only, restricting access to folders for which the admin has advanced permissions.
- Product
- Team Folders
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026Circles' remote-instance signature verification fetches the attacker-supplied keyId URL before trust in the remote instance is established, and explicitly allowCVE-2026-77164 · Other software · Nextcloud · reported by support@hackerone.comMedium 6.2
Circles' remote-instance signature verification fetches the attacker-supplied keyId URL before trust in the remote instance is established, and explicitly allows local/private addresses for this request, bypassing Nextcloud's core SSRF protections. The public, unauthenticated endpoints POST /apps/circles/event/ and POST /apps/circles/incoming/ reach this code path, allowing any unauthenticated user to force the server to issue a GET request to an internal address. The response body of the internal request is never returned to the requester, so this is blind SSRF: an attacker can determine whether an internal service is reachable, but cannot read its response contents through this endpoint alone.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 17, 2026After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of.CVE-2026-68493 · Other software · Nextcloud · reported by support@hackerone.comLow 3.1
After guessing a 62^15 complex unique identifier, a malicious logged in user was able to retrieve a list of memberships for a circle they are not a member of.
- Product
- Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 25, 2026Nextcloud MCP Server is a production-ready MCP server that connects AI assistants to a Nextcloud instance.CVE-2026-55640 · Other software · cbcoutinho · reported by GitHubCritical 9.1
Nextcloud MCP Server is a production-ready MCP server that connects AI assistants to a Nextcloud instance. Prior to 0.117.2, the POST /webhooks/nextcloud endpoint in nextcloud_mcp_server/vector/webhook_receiver.py has no authentication by default because WEBHOOK_SECRET defaults to None and startup validation does not require it. When WEBHOOK_SECRET is unset, handle_nextcloud_webhook() accepts unauthenticated requests. The payload["user"]["uid"] field parsed in nextcloud_mcp_server/vector/webhook_parser.py is attacker-controlled and is used without an authenticated-session cross-check for Qdrant operations, allowing a network attacker to delete or trigger re-indexing of vector embeddings for any user and to destroy the semantic search index by sending forged deletion events. This issue is fixed in version 0.117.2.
- Product
- nextcloud-mcp-server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45810 · Other software · nextcloud · reported by GitHubMedium 6.8
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file comment, to read the content of all comments. It is recommended that the Nextcloud Server is upgraded to 31.0.12 or 32.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 21.0.9.20, 22.2.10.35, 23.0.12.31, 24.0.12.30, 25.0.13.25, 26.0.13.22, 27.1.11.22, 28.0.14.13, 29.0.16.10, 30.0.17.5, 31.0.12 or 32.0.3
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45722 · Other software · nextcloud · reported by GitHubHigh 7.1
Nextcloud is an open source content collaboration platform. From versions 0.9.0 to before 0.9.7, and 1.0.0 to before 1.0.2, a missing sanitization in the Tables app allowed a user with access to the tables app to perform a limited SQL injection in the ORDER BY statement of a query. Compared to normal SQL injections, the ORDER BY is limited to extracting a single bit of information per request or to make the database wait for a given time. This issue has been patched in versions 0.9.7 and 1.0.2.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45691 · Other software · nextcloud · reported by GitHubMedium 5.9
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie (created after successful password authentication but before TOTP completion) could be reused as a Bearer token to authenticate against DAV endpoints, granting read/write access and bypassing mandatory two-factor authentication. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45690 · Other software · nextcloud · reported by GitHubMedium 5.9
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authentication bypass vulnerability allowed attackers with knowledge of a user's password to circumvent two-factor authentication (2FA) protections. When a user initiated login with valid credentials on a 2FA-enabled account, the system created a temporary session token before enforcing the second factor challenge. This token could be extracted and replayed via HTTP Basic Authentication to gain unauthorized access to authenticated endpoints. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45545 · Other software · nextcloud · reported by GitHubHigh 8.2
Nextcloud is an open source content collaboration platform. From versions 0.7.0 to before 0.7.7, 0.8.0 to before 0.8.10, 0.9.0 to before 0.9.8, and 1.0.0 to before 1.0.4, an authenticated attacker with access to the Tables app may be able to execute arbitrary up to 20 bytes long SQL queries, through a stored injection. With carefully crafted input it is possible to break out of the length limitation. The attacker could use this to extract information from the database, or modify data. This issue has been patched in versions 0.7.7, 0.8.10, 0.9.8, 1.0.4, and 2.0.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45544 · Other software · nextcloud · reported by GitHubMedium 4.3
Nextcloud is an open source content collaboration platform. From version 0.8.0 to before version 1.0.4, the view filter criteria is exposed to users with read-only permissions in Nextcloud Tables. This issue has been patched in versions 1.0.4 and 2.0.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45543 · Other software · nextcloud · reported by GitHubMedium 5.3
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45286 · Other software · nextcloud · reported by GitHubMedium 4.3
Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint for suggesting attendees. The sharing restrictions, applied to other endpoints, were not effective here. This issue has been patched in versions 5.5.17 and 6.2.3.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45285 · Other software · nextcloud · reported by GitHubMedium 6.4
Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a user shares a folder or file with a Nextcloud Team that includes an external member (a person added via email address who does not have a Nextcloud account), the system automatically creates a public link for that external member. This public link is not displayed in the share section of the folder, so the folder owner has no knowledge of its existence. It is sent via email to the external member. It grants the same permissions (read, write, delete, reshare, download) as the Team’s access. An attacker who receives or intercepts this link can access, modify, delete, reshare, and download all data in the shared folder without any further authentication. The folder owner cannot see or revoke the link through the normal sharing interface. This issue has been patched in versions 32.0.9 and 33.0.3.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45284 · Other software · nextcloud · reported by GitHubMedium 4.6
Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45283 · Other software · nextcloud · reported by GitHubMedium 6.3
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock requests. An authenticated user could lock or unlock files belonging to other users by targeting their absolute WebDAV paths. Additionally, lock tokens were disclosed to unauthorized callers in error responses, allowing attackers to remove token-based locks placed by other users' client applications. It is recommended that the Nextcloud Server is upgraded to 32.0.2 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 31.0.14.4 or 32.0.2 or 33.0.1
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45282 · Other software · nextcloud · reported by GitHubMedium 6.5
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing password protection or download restrictions. It is applicable to any file that is shared directly, as the attacker only needs to know a documentId they own, apart of the mentioned share token. For shared folders the attacker has to know or guess a documentId of a file that is included inside the folder, making it much harder to exploit. The attacker can only extract an attachments, but not the file shared file or folder itself. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 or 27.1.11.5
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45281 · Other software · nextcloud · reported by GitHubHigh 8.1
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access to their calendar. Therefore, the attacker must be an authenticated user. This is because of improper authorization controls in the backend of the calendar. If the attacker had access to the calendar, they would be able to view and modify it. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17, 27.1.11.26, 26.0.13.26, 25.0.13.29, 24.0.12.34, 23.0.12.35, 22.2.10.39, or 21.0.9.23
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45279 · Other software · nextcloud · reported by GitHubMedium 4.4
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.14, and 32.0.0 to before 32.0.4, if {lang} is used in the template directory config value, non-admin users can in some cases copy arbitrary files (depending on unix permissions) into their own Nextcloud directory via a path traversal. It is recommended that the Nextcloud Server is upgraded to 32.0.4, 31.0.14. It is recommended that the Nextcloud Enterprise Server is upgraded to 32.0.4, 31.0.14, 30.0.17.7, 29.0.17.12, 28.0.14.15
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45278 · Other software · nextcloud · reported by GitHubLow 3.3
Nextcloud is an open source content collaboration platform. From version 6.1.0 to before version 8.2.2, an attacker can craft links that would redirect users to another website, when the victim uses the attackers link to log in via user OIDC. This issue has been patched in version 8.2.2.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45277 · Other software · nextcloud · reported by GitHubLow 3.3
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, authenticated users can check if arbitrary files are associated with specific approval workflows where they can request approval. This issue has been patched in version 2.7.2.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45275 · Other software · nextcloud · reported by GitHubMedium 6.5
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45267 · Other software · nextcloud · reported by GitHubMedium 6.5
Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45266 · Other software · nextcloud · reported by GitHubLow 3.5
Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45264 · Other software · nextcloud · reported by GitHubMedium 4.3
Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45159 · Other software · nextcloud · reported by GitHubLow 3.5
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45157 · Other software · nextcloud · reported by GitHubMedium 6.3
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a malicious user has access to a file share of a user, they could use this share token to also access the chunking upload directly and see temporary part files during on going uploads. It is recommended that the Nextcloud Server is upgraded to 32.0.9 or 33.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 or 33.0.3
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45156 · Other software · nextcloud · reported by GitHubHigh 8.1
Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This issue has been patched in versions 3.1.0, 4.1.0, 5.1.0, 6.4.0 and 8.3.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45155 · Other software · nextcloud · reported by GitHubLow 2.6
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.7 and 33.0.0 to before 33.0.1, a missing access check on API level allowed to add unknown circles by their ID directly to other circles. Since circle IDs have 62^15 complexity by default this is still unlikely to be executable at will, but if access to an ID was available via another source, memberships could be tracked like this. It is recommended that the Nextcloud Server is upgraded to 32.0.7 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 29.0.16.14, 30.0.17.8, 31.0.14.3, 32.0.7 or 33.0.1
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45154 · Other software · nextcloud · reported by GitHubLow 2.6
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 1, 2026Nextcloud is an open source content collaboration platform.CVE-2026-45153 · Other software · nextcloud · reported by GitHubMedium 4.6
Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patched in version 33.1.0.
- Product
- security-advisories
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 14, 2026Nextcloud News is an RSS/Atom feed reader.CVE-2026-44515 · Other software · nextcloud · reported by GitHubLow 2.3
Nextcloud News is an RSS/Atom feed reader. Prior to 28.3.0-beta.1, Nextcloud News allows authenticated users to add feeds by providing a feed URL (via the web interface or the API). In affected versions, an authenticated attacker could provide a URL pointing to internal/private IP ranges or localhost, causing the Nextcloud server to perform server-side HTTP requests to attacker-controlled destinations, but not relaying the result. This enables blind SSRF, which can be used to scan or probe internal network services that are reachable from the Nextcloud server. This vulnerability is fixed in 28.3.0-beta.1.
- Product
- news
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 31, 2026OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak CVE-2026-33580 · Other software · OpenClaw · reported by VulnCheckMedium 6.3
OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets. Attackers who can reach the webhook endpoint can exploit this to forge inbound webhook events by repeatedly attempting authentication without throttling.
- Product
- OpenClaw
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 18, 2026OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without CVE-2026-28449 · Other software · OpenClaw · reported by VulnCheckMedium 6.3
OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
- Product
- OpenClaw
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 5, 2026OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, alloCVE-2026-28474 · Other software · OpenClaw · reported by VulnCheckCritical 9.3
OpenClaw's Nextcloud Talk plugin versions prior to 2026.2.6 accept equality matching on the mutable actor.name display name field for allowlist validation, allowing attackers to bypass DM and room allowlists. An attacker can change their Nextcloud display name to match an allowlisted user ID and gain unauthorized access to restricted conversations.
- Product
- nextcloud-talk
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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