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Not in CISA KEV
MEDIUM severity

Stored XSS vulnerability in Jenkins Git Changelog PluginGHSA-jcmg-9rw5-9rm2

MEDIUM

GHSA-jcmg-9rw5-9rm2 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in de.wellnerbou.jenkins:git-changelog. A fix is available for de.wellnerbou.jenkins:git-changelog — see the affected versions and patch details below.

Also known asCVE-2018-1000426
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs63th percentile — riskier than 63% of all scored CVEsHighest risk
0.00%0.50%1.00%1.49%0.1%1.0%May 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
☕de.wellnerbou.jenkins:git-changelog

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

A cross-site scripting vulnerability exists in Jenkins Git Changelog Plugin 2.6 and earlier in GitChangelogSummaryDecorator/summary.jelly, GitChangelogLeftsideBuildDecorator/badge.jelly, GitLogJiraFilterPostPublisher/config.jelly, GitLogBasicChangelogPostPublisher/config.jelly that allows attackers able to control the Git history parsed by the plugin to have Jenkins render arbitrary HTML on some pages.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavende.wellnerbou.jenkins:git-changelogall versions2.7de.wellnerbou.jenkins:git-changelog:2.7

Affected Products

1 product · 1 configurations
Application
git changelogjenkins
≤ 2.6
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 de.wellnerbou.jenkins:git-changelog, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update de.wellnerbou.jenkins:git-changelog to 2.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jcmg-9rw5-9rm2 is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

A cross-site scripting vulnerability exists in Jenkins Git Changelog Plugin 2.6 and earlier in GitChangelogSummaryDecorator/summary.jelly, GitChangelogLeftsideBuildDecorator/badge.jelly, GitLogJiraFilterPostPublisher/config.jelly, GitLogBasicChangelogPostPublisher/config.jelly that allows attackers able to control the Git history parsed by the plugin to have Jenkins render arbitrary HTML on some pages.
O3 Security · Impact-Aware SCA

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Stored XSS vulnerability in Jenkins Git Changelog Plugin