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☕ Maven
Not in CISA KEV
HIGH severity

Jenkins CAS Plugin Session Fixation vulnerabilityGHSA-hjh8-9gxh-cx4x

HIGHFix: jenkinsci/cas-plugin@3a33cc0

GHSA-hjh8-9gxh-cx4x is a high-severity (CVSS 8.8) CWE-384 vulnerability in org.jenkins-ci.plugins:cas-plugin. A fix is available for org.jenkins-ci.plugins:cas-plugin — see the affected versions and patch details below.

Also known asCVE-2023-32997
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-hjh8-9gxh-cx4x.

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs57th percentile — riskier than 57% of all scored CVEsHighest risk
0.13%0.52%0.91%1.30%0.6%0.8%May 26Sep 26Nov 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:cas-plugin

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

Jenkins CAS Plugin 1.6.2 and earlier does not invalidate the existing session on login.

This allows attackers to use social engineering techniques to gain administrator access to Jenkins.

CAS Plugin 1.6.3 invalidates the existing session on login.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.jenkins-ci.plugins:cas-pluginall versions1.6.3org.jenkins-ci.plugins:cas-plugin:1.6.3

Affected Products

1 product · 1 configurations
Application
casjenkins
≤ 1.6.2
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:cas-plugin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.jenkins-ci.plugins:cas-plugin to 1.6.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hjh8-9gxh-cx4x 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

Jenkins CAS Plugin 1.6.2 and earlier does not invalidate the existing session on login. This allows attackers to use social engineering techniques to gain administrator access to Jenkins. CAS Plugin 1.6.3 invalidates the existing session on login.
O3 Security · Impact-Aware SCA

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Jenkins CAS Plugin Session Fixation vulnerability (High 8.8)