GHSA-mxcc-7h5m-x57r is a low-severity (CVSS 3.1) CWE-203 vulnerability in com.coravy.hudson.plugins.github:github. A fix is available for com.coravy.hudson.plugins.github:github — see the affected versions and patch details below.
Jenkins GitHub plugin uses weak webhook signature function
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-mxcc-7h5m-x57r plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
com.coravy.hudson.plugins.github:githubReal-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 GitHub Plugin 1.34.4 and earlier uses a non-constant time comparison function when checking whether the provided and computed webhook signatures are equal, allowing attackers to use statistical methods to obtain a valid webhook signature. GitHub Plugin 1.34.5 uses a constant-time comparison when validating the webhook signature.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.coravy.hudson.plugins.github:github | all versions | 1.34.5com.coravy.hudson.plugins.github:github:1.34.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.coravy.hudson.plugins.github:github, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update com.coravy.hudson.plugins.github:github to 1.34.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mxcc-7h5m-x57r is resolved across your whole dependency graph.
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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-mxcc-7h5m-x57r can be triaged on real exposure rather than presence alone.
Tailored to GHSA-mxcc-7h5m-x57r. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat OpenShift Container Platform 4.10 | jenkins-2-plugins-0:4.10.1675144701-1.el8 | RHSA-2023:0560 |
| Red Hat OpenShift Container Platform 4.8 | jenkins-2-plugins-0:4.8.1672842762-1.el8 | RHSA-2023:0017 |
| Red Hat OpenShift Container Platform 4.9 | jenkins-2-plugins-0:4.9.1675668922-1.el8 | RHSA-2023:0777 |
Frequently Asked Questions
Is GHSA-mxcc-7h5m-x57r in your dependencies?
O3 Security finds GHSA-mxcc-7h5m-x57r across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.