Jenkins SAML Plugin allows bypassing CSRF protection for any URL
An extension point in Jenkins allows selectively disabling cross-site request forgery (CSRF) protection for specific URLs. SAML Plugin implements this extension point for the URL that users are redirected to after login.
In Jenkins SAML Plugin 2.0.7 and earlier this implementation is too permissive, allowing attackers to craft URLs that would bypass the CSRF protection of any target URL.\n\nThis vulnerability was originally introduced in Jenkins SAML Plugin 1.1.3.
Jenkins SAML Plugin 2.0.8 restricts which URLs it disables cross-site request forgery (CSRF) protection for to the one URL that needs it.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.jenkins-ci.plugins:saml | < 2.0.8 | 2.0.8 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-21678
- https://github.com/jenkinsci/saml-plugin/commit/e063317ee7e1c64a096e0ac323c7155b786c8b9d
- https://github.com/jenkinsci/saml-plugin
- https://www.jenkins.io/security/advisory/2021-08-31/#SECURITY-2469
- http://www.openwall.com/lists/oss-security/2021/08/31/1
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-352, CWE-693- Platform
- Java / Kotlin (Maven)
- Package
org.jenkins-ci.plugins:saml- Disclosed
- 24.05.2022
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-r5w3-pfq8-3r82 - CC BY 4.0
Vulnerability history: org.jenkins-ci.plugins:saml
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 05.2022 10.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 1
Disclosures per year
- 2022: 2
- 2023: 0
- 2024: 0
- 2025: 1
- 2026: 0
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Jenkins SAML Plugin allows bypassing CSRF protection for any URL this entry
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