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.
23 results
Sep 24, 2026Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path CVE-2026-95811 · Other software · reported by 9b29abf9-4ab0-4765-b253-1875cd9b441eMedium 6.5
Lemonldap::NG::Handler versions from 2.0.0 before 2.16.10, from 2.17.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow an equivalent spelling of a path to bypass the locationRules that restrict it. The handler matches each vhost's locationRules regular expressions against REQUEST_URI, the raw request line, while the web server routes on the path it has already percent-decoded and normalized. A request that percent-encodes a character of the path, inserts dot segments, or doubles a slash therefore reaches the protected resource under a URI that no rule regexp matches, and the vhost's default rule decides access. Deny rules, identity and group conditions, and unprotect and skip rules are bypassed alike. Only a vhost whose default rule is more permissive than its other rules is affected. An authenticated user then reaches any URL a locationRules regexp was meant to restrict, but gains no more than that default rule already grants.
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Sep 24, 2026Lemonldap::NG::Portal versions from 2.23.0 before 2.23.4 for Perl allow a PKCE bypass for public Relying Parties in "PKCE or secret" mode because checkEndPointACVE-2026-92289 · Other software · reported by 9b29abf9-4ab0-4765-b253-1875cd9b441eCritical 9.1
Lemonldap::NG::Portal versions from 2.23.0 before 2.23.4 for Perl allow a PKCE bypass for public Relying Parties in "PKCE or secret" mode because checkEndPointAuthenticationCredentials does not verify the client secret. With oidcRPMetaDataOptionsRequirePKCE set to 2, the authorization endpoint issues a code even when the request carries no code_challenge, and token() admits the exchange as long as a challenge was stored or an authentication method was returned for the caller. checkEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the method deduced from the request, so any Basic or form credential satisfies the secret branch. validatePKCEChallenge() then passes, because neither a challenge nor a verifier is present. An attacker who intercepts an authorization code issued to a public Relying Party can exchange it for the user's access, ID and refresh tokens by replaying the client_id with an arbitrary secret, which is the attack PKCE prevents. Dynamic client registration creates every Relying Party in this mode.
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Sep 24, 2026Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPoCVE-2026-92288 · Other software · reported by 9b29abf9-4ab0-4765-b253-1875cd9b441eCritical 9.1
Lemonldap::NG::Portal versions from 2.20.0 before 2.21.6, from 2.22.0 before 2.23.4 for Perl allow unauthenticated OAuth2 token introspection because checkEndPointAuthenticationCredentials does not verify the client secret of a public Relying Party. checkEndPointAuthenticationCredentials() skips the secret comparison for a Relying Party marked public and still returns the authentication method deduced from the request, client_secret_basic or client_secret_post. introspection() rejects a caller only when that method is missing or none, so a request carrying a public client_id and an arbitrary or empty secret passes the endpoint's authentication check. An attacker who holds an access token and knows the client_id of any public Relying Party can confirm the token is active and read its metadata, including scope, audience, expiry and the sub claim. The sub claim is computed with the calling Relying Party's user identifier attribute, so an attacker can translate a user identifier from one Relying Party to another, defeating per-client and pseudonymous identifiers.
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Aug 16, 2026Lemonldap::NG::Portal versions from 2.0.0 before 2.16.9, from 2.17.0 before 2.21.5, from 2.22.0 before 2.23.3 for Perl allow authentication bypass via an OAuth2CVE-2026-19349 · Other software · reported by 9b29abf9-4ab0-4765-b253-1875cd9b441eCritical 9.8
Lemonldap::NG::Portal versions from 2.0.0 before 2.16.9, from 2.17.0 before 2.21.5, from 2.22.0 before 2.23.3 for Perl allow authentication bypass via an OAuth2 state parameter stored as an SSO session in the GitHub and LinkedIn backends. Before redirecting to the identity provider, extractFormInfo() creates the state session with the positional call `getApacheSession( undef, 1, 0, 'GitHubState' )`. getApacheSession() takes a session id followed by a named argument hash, so the trailing arguments become that hash, `kind` defaults to SSO, and the state is written to the global session storage as a regular SSO session. Its identifier is handed to the unauthenticated visitor as the state parameter of the redirection URL. Any visitor who reaches the GitHub or LinkedIn endpoint can replay that identifier as a session cookie and obtain a valid SSO session without authenticating. The session holds neither _user nor authenticationLevel, which the shipped bootstrap configuration accepts because it grants virtual hosts a "default => accept" access rule; deployments whose rules test the user or require an authentication level are less exposed. Only configurations with the GitHub or LinkedIn
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Jan 16, 2026In the portal in LemonLDAP::NG before 2.21.0, cross-site scripting (XSS) allows remote attackers to inject arbitrary web script or HTML (into the login page) viCVE-2025-31510 · Other software · lemonldap-ng · reported by MITREHigh 7.2
In the portal in LemonLDAP::NG before 2.21.0, cross-site scripting (XSS) allows remote attackers to inject arbitrary web script or HTML (into the login page) via the tab parameter, for Choice authentication.
- Product
- LemonLDAP::NG
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglists.debian.org
Sep 17, 2025In LemonLDAP::NG before 2.16.7 and 2.17 through 2.21 before 2.21.3, OS command injection can occur in the Safe jail.CVE-2025-59518 · Other software · lemonldap-ng · reported by MITREHigh 8
In LemonLDAP::NG before 2.16.7 and 2.17 through 2.21 before 2.21.3, OS command injection can occur in the Safe jail. It does not Localize _ during rule evaluation. Thus, an administrator who can edit a rule evaluated by the Safe jail can execute commands on the server.
- Product
- LemonLDAP::NG
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Nov 18, 2024A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.20.1 allows remote attackers to inject arbitrary web script or HTML via the url parameter oCVE-2024-52947 · Other software · reported by MITREMedium 5.4
A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.20.1 allows remote attackers to inject arbitrary web script or HTML via the url parameter of the upgrade session confirmation page (upgradeSession / forceUpgrade) if the "Upgrade session" plugin has been enabled by an admin
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglists.debian.org
Nov 18, 2024An issue was discovered in LemonLDAP::NG before 2.20.1.CVE-2024-52946 · Other software · lemonldap-ng · reported by MITREHigh 8.8
An issue was discovered in LemonLDAP::NG before 2.20.1. An Improper Check during session refresh allows an authenticated user to raise their authentication level if the admin configured an "Adaptative authentication rule" with an increment instead of an absolute value.
- Product
- lemonldap-ng
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglists.debian.org
Nov 10, 2024An issue was discovered in LemonLDAP::NG before 2.0.12.CVE-2021-35473 · Other software · lemonldap-ng · reported by MITRECritical 9.1
An issue was discovered in LemonLDAP::NG before 2.0.12. There is a missing expiration check in the OAuth2.0 handler, i.e., it does not verify access token validity. An attacker can use a expired access token from an OIDC client to access the OAuth2 handler The earliest affected version is 2.0.4.
- Product
- lemonldap-ng
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Oct 9, 2024A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.19.3 allows remote attackers to inject arbitrary web script or HTML into the login page viaCVE-2024-48933 · Other software · lemonldap-ng · reported by MITREMedium 6.1
A cross-site scripting (XSS) vulnerability in LemonLDAP::NG before 2.19.3 allows remote attackers to inject arbitrary web script or HTML into the login page via a username if userControl has been set to a non-default value that allows special HTML characters.
- Product
- lemonldap-ng
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglists.debian.org
Oct 9, 2024Incorrect credential validation in LemonLDAP::NG 2.18.x and 2.19.x before 2.19.2 allows attackers to bypass OAuth2 client authentication via an empty client_pasCVE-2024-45160 · Other software · lemonldap-ng · reported by MITRECritical 9.1
Incorrect credential validation in LemonLDAP::NG 2.18.x and 2.19.x before 2.19.2 allows attackers to bypass OAuth2 client authentication via an empty client_password parameter (client secret).
- Product
- lemonldap-ng
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Sep 29, 2023A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before 2.17.1 allows authenticated remote attackers to send GET requests to arCVE-2023-44469 · Other software · Lemonldap-ng · reported by MITREMedium 4.3
A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before 2.17.1 allows authenticated remote attackers to send GET requests to arbitrary URLs through the request_uri authorization parameter. This is similar to CVE-2020-10770.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
May 29, 2023In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not properly restrict access to SOAP/REST endpoints (when soCVE-2019-19791 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
In LemonLDAP::NG (aka lemonldap-ng) before 2.0.7, the default Apache HTTP Server configuration does not properly restrict access to SOAP/REST endpoints (when some LemonLDAP::NG setup options are used). For example, an attacker can insert index.fcgi/index.fcgi into a URL to bypass a Require directive.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orgprojects.ow2.org
Apr 15, 2023In LemonLDAP::NG before 2.0.15.CVE-2022-37186 · Other software · Lemonldap-ng · reported by MITREMedium 5.9
In LemonLDAP::NG before 2.0.15. some sessions are not deleted when they are supposed to be deleted according to the timeoutActivity setting. This can occur when there are at least two servers, and a session is manually removed before the time at which it would have been removed automatically.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Mar 31, 2023An issue was discovered in LemonLDAP::NG before 2.16.1.CVE-2023-28862 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
An issue was discovered in LemonLDAP::NG before 2.16.1. Weak session ID generation in the AuthBasic handler and incorrect failure handling during a password check allow attackers to bypass 2FA verification. Any plugin that tries to deny session creation after the store step does not deny an AuthBasic session.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Jul 17, 2022An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13.CVE-2021-40874 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13. When using the RESTServer plug-in to operate a REST password validation service (for another LemonLDAP::NG instance, for example) and using the Kerberos authentication method combined with another method with the Combination authentication plug-in, any password will be recognized as valid for an existing user.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Jul 17, 2022In LemonLDAP::NG (aka lemonldap-ng) through 2.0.8, validity of the X.509 certificate is not checked by default when connecting to remote LDAP backends, because CVE-2020-16093 · Other software · Lemonldap-ng · reported by MITREHigh 7.5
In LemonLDAP::NG (aka lemonldap-ng) through 2.0.8, validity of the X.509 certificate is not checked by default when connecting to remote LDAP backends, because the default configuration of the Net::LDAPS module for Perl is used.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglemonldap-ng.org
Jul 30, 2021An issue was discovered in LemonLDAP::NG before 2.0.12.CVE-2021-35472 · Other software · Lemonldap-ng · reported by MITREHigh 8.8
An issue was discovered in LemonLDAP::NG before 2.0.12. Session cache corruption can lead to authorization bypass or spoofing. By running a loop that makes many authentication attempts, an attacker might alternately be authenticated as one of two different users.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Sep 14, 2020An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used.CVE-2020-24660 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
An issue was discovered in LemonLDAP::NG through 2.0.8, when NGINX is used. An attacker may bypass URL-based access control to protected Virtual Hosts by submitting a non-normalized URI. This also affects versions before 0.5.2 of the "Lemonldap::NG handler for Node.js" package.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 25, 2019OpenID Connect Issuer in LemonLDAP::NG 2.x through 2.0.5 may allow an attacker to bypass access control rules via a crafted OpenID Connect authorization requestCVE-2019-15941 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
OpenID Connect Issuer in LemonLDAP::NG 2.x through 2.0.5 may allow an attacker to bypass access control rules via a crafted OpenID Connect authorization request. To be vulnerable, there must exist an OIDC Relaying party within the LemonLDAP configuration with weaker access control rules than the target RP, and no filtering on redirection URIs.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orgprojects.ow2.org
Jun 28, 2019LemonLDAP::NG before 1.9.20 has an XML External Entity (XXE) issue when submitting a notification to the notification server.CVE-2019-13031 · Other software · Lemonldap-ng · reported by MITREHigh 8.1
LemonLDAP::NG before 1.9.20 has an XML External Entity (XXE) issue when submitting a notification to the notification server. By default, the notification server is not enabled and has a "deny all" rule.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orglists.debian.org
May 22, 2019LemonLDAP::NG -2.0.3 has Incorrect Access Control.CVE-2019-12046 · Other software · Lemonldap-ng · reported by MITRECritical 9.8
LemonLDAP::NG -2.0.3 has Incorrect Access Control.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgitlab.ow2.orggitlab.ow2.org
Jan 1, 2013LemonLDAP::NG before 1.2.3 does not use the signature-verification capability of the Lasso library, which allows remote attackers to bypass intended access-contCVE-2012-6426 · Other software · Lemonldap-ng · reported by MITREHigh 7.5
LemonLDAP::NG before 1.2.3 does not use the signature-verification capability of the Lasso library, which allows remote attackers to bypass intended access-control restrictions via crafted SAML data.
- Product
- Lemonldap\
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordjira.ow2.orgopenwall.com
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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