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☕ Maven
Not in CISA KEV
HIGH severity

CVE-2021-21679 — azure-ad

HIGHFix: jenkinsci/azure-ad-plugin@8b1e80e

CVE-2021-21679 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in org.jenkins-ci.plugins:azure-ad. A fix is available for org.jenkins-ci.plugins:azure-ad — see the affected versions and patch details below.

Jenkins Azure AD Plugin allows bypassing CSRF protection for any URL

Also known asGHSA-x77r-7m5w-pqq2
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 29, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.39%0.79%1.18%0.1%0.7%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
☕org.jenkins-ci.plugins:azure-ad

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

An extension point in Jenkins allows selectively disabling cross-site request forgery (CSRF) protection for specific URLs. Jenkins Azure AD Plugin implements this extension point for URLs used by a JavaScript component.

In Jenkins Azure AD Plugin 179.vf6841393099e and earlier this implementation is too permissive, allowing attackers to craft URLs that would bypass the CSRF protection of any target URL.

This vulnerability was originally introduced in Azure AD Plugin 164.v5b48baa961d2.

Azure AD Plugin 180.v8b1e80e6f242 no longer allows bypassing CSRF protection for URLs used by the JavaScript component. Instead, that component was reconfigured to pass the expected CSRF token.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:azure-adall versions180.v8b1e80e6f242org.jenkins-ci.plugins:azure-ad:180.v8b1e80e6f242

Affected Products

1 product · 1 configurations
Application
azure adjenkins
≥ 164.v5b48baa961d2 && ≤ 179.vf6841393099e
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:azure-ad, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:azure-ad to 180.v8b1e80e6f242 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21679 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

An extension point in Jenkins allows selectively disabling cross-site request forgery (CSRF) protection for specific URLs. Jenkins Azure AD Plugin implements this extension point for URLs used by a JavaScript component. In Jenkins Azure AD Plugin 179.vf6841393099e and earlier this implementation is too permissive, allowing attackers to craft URLs that would bypass the CSRF protection of any target URL. This vulnerability was originally introduced in Azure AD Plugin 164.v5b48baa961d2. Azure AD Plugin 180.v8b1e80e6f242 no longer allows bypassing CSRF protection for URLs used by the JavaScript
O3 Security · Impact-Aware SCA

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CVE-2021-21679: azure-ad CSRF — Fix Available