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MEDIUM severity

CVE-2024-23902 — gitlab-branch-source

MEDIUMFix: jenkinsci/gitlab-branch-source-plugin@5fa356e

CVE-2024-23902 is a medium-severity (CVSS 4.3) Cross-Site Request Forgery (CSRF) vulnerability in io.jenkins.plugins:gitlab-branch-source. A fix is available for io.jenkins.plugins:gitlab-branch-source — see the affected versions and patch details below.

CSRF vulnerability in Jenkins GitLab Branch Source Plugin

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 27, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • 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 CVE-2024-23902.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs25th percentile — riskier than 25% of all scored CVEsHighest risk
0.00%0.27%0.55%0.82%0.0%0.3%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
☕io.jenkins.plugins:gitlab-branch-source

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 GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not require POST requests for a form validation endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.

This vulnerability allows attackers to connect to an attacker-specified URL.

GitLab Branch Source Plugin 688.v5fa_356ee8520 requires POST requests for the affected form validation endpoint.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenio.jenkins.plugins:gitlab-branch-sourceall versions688.v5faio.jenkins.plugins:gitlab-branch-source:688.v5fa

Affected Products

1 product · 1 configurations
Application
github branch sourcejenkins
≤ 684.vea_fa_7c1e2fe3
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 io.jenkins.plugins:gitlab-branch-source, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update io.jenkins.plugins:gitlab-branch-source to 688.v5fa or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-23902 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 GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not require POST requests for a form validation endpoint, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to connect to an attacker-specified URL. GitLab Branch Source Plugin 688.v5fa_356ee8520 requires POST requests for the affected form validation endpoint.
O3 Security · Impact-Aware SCA

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CVE-2024-23902: gitlab-branch CSRF — Fixed in 688.v5fa