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.
9 results
Jun 29, 2026Cross Site Request Forgery vulnerability in Squidex.io Squidex CMS v.7.21.0 and before allows a remote attacker to escalate privileges via the IdentityServer acCVE-2026-31016 · Other software · reported by MITREMedium 6.5
Cross Site Request Forgery vulnerability in Squidex.io Squidex CMS v.7.21.0 and before allows a remote attacker to escalate privileges via the IdentityServer account profile endpoint
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comlgnas.gitbook.io
Mar 17, 2026A vulnerability was determined in Duende IdentityServer4 up to 4.1.2.CVE-2026-4349 · Other software · Duende · reported by VulDBMedium 6.3
A vulnerability was determined in Duende IdentityServer4 up to 4.1.2. The affected element is an unknown function of the file /connect/authorize of the component Token Renewal Endpoint. This manipulation of the argument id_token_hint causes improper authentication. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. This vulnerability only affects products that are no longer supported by the maintainer.
- Product
- IdentityServer4
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 28, 2024Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core.CVE-2024-49755 · Other software · DuendeSoftware · reported by GitHubLow 3.1
Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core. IdentityServer's local API authentication handler performs insufficient validation of the cnf claim in DPoP access tokens. This allows an attacker to use leaked DPoP access tokens at local api endpoints even without possessing the private key for signing proof tokens. Note that this only impacts custom endpoints within an IdentityServer implementation that have explicitly used the LocalApiAuthenticationHandler for authentication. This vulnerability is patched in IdentityServer 7.0.8. Version 6.3 and below are unaffected, as they do not support DPoP in Local APIs.
- Product
- IdentityServer
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 31, 2024Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core.CVE-2024-39694 · Other software · DuendeSoftware · reported by GitHubMedium 4.7
Duende IdentityServer is an OpenID Connect and OAuth 2.x framework for ASP.NET Core. It is possible for an attacker to craft malicious Urls that certain functions in IdentityServer will incorrectly treat as local and trusted. If such a Url is returned as a redirect, some browsers will follow it to a third-party, untrusted site. Note: by itself, this vulnerability does **not** allow an attacker to obtain user credentials, authorization codes, access tokens, refresh tokens, or identity tokens. An attacker could however exploit this vulnerability as part of a phishing attack designed to steal user credentials. This vulnerability is fixed in 7.0.6, 6.3.10, 6.2.5, 6.1.8, and 6.0.5. Duende.IdentityServer 5.1 and earlier and all versions of IdentityServer4 are no longer supported and will not be receiving updates. If upgrading is not possible, use `IUrlHelper.IsLocalUrl` from ASP.NET Core to validate return Urls in user interface code in the IdentityServer host.
- Product
- IdentityServer
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 25, 2023The sisqualWFM 7.1.319.103 thru 7.1.319.111 for Android, has a host header injection vulnerability in its "/sisqualIdentityServer/core/" endpoint.CVE-2023-36085 · Other software · Sisqualwfm · reported by MITREMedium 6.1
The sisqualWFM 7.1.319.103 thru 7.1.319.111 for Android, has a host header injection vulnerability in its "/sisqualIdentityServer/core/" endpoint. By modifying the HTTP Host header, an attacker can change webpage links and even redirect users to arbitrary or malicious locations. This can lead to phishing attacks, malware distribution, and unauthorized access to sensitive resources.
- Product
- Sisqualwfm
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordpacketstormsecurity.comgithub.com
May 11, 2022A cross-site scripting (XSS) vulnerability in Skoruba IdentityServer4.Admin before 2.0.0 via unencoded value passed to the data-secret-value parameter.CVE-2021-28290 · Other software · Identityserver4.admin Project · reported by MITREMedium 6.1
A cross-site scripting (XSS) vulnerability in Skoruba IdentityServer4.Admin before 2.0.0 via unencoded value passed to the data-secret-value parameter.
- Product
- Identityserver4.admin
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 21, 2019IdentityServer IdentityServer4 through 2.4 has stored XSS via the httpContext to the host/Extensions/RequestLoggerMiddleware.cs LogForErrorContext method, whichCVE-2019-12250 · Other software · Identityserver · reported by MITREMedium 6.1
IdentityServer IdentityServer4 through 2.4 has stored XSS via the httpContext to the host/Extensions/RequestLoggerMiddleware.cs LogForErrorContext method, which can be triggered by viewing a log. NOTE: the software maintainer disputes that this is a vulnerability because the request logger is not part of IdentityServer but only our development test host
- Product
- Identityserver4
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 22, 2018IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSCVE-2018-8899 · Other software · Identityserver · reported by MITREMedium 6.1
IdentityServer IdentityServer4 1.x before 1.5.3 and 2.x before 2.1.3 does not encode the redirect URI on the authorization response page, which might lead to XSS in some configurations.
- Product
- Identityserver4
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 7, 2017IdentityServer3 2.4.x, 2.5.x, and 2.6.x before 2.6.1 has XSS in an Angular expression on the authorize response page, which might allow remote attackers to obtaCVE-2017-12677 · Other software · Identityserver · reported by MITREMedium 6.1
IdentityServer3 2.4.x, 2.5.x, and 2.6.x before 2.6.1 has XSS in an Angular expression on the authorize response page, which might allow remote attackers to obtain sensitive information about the IdentityServer authorization response.
- Product
- Identityserver3
- 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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