GHSA-x8mf-jcmf-r79f — cloudbees-bitbucket-branc…
MEDIUMFix: jenkinsci/bitbucket-branch-source-plugin@ad359b3GHSA-x8mf-jcmf-r79f is a medium-severity (CVSS 4.3) CWE-532 vulnerability in org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source. A fix is available for org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source — see the affected versions and patch details below.
Bitbucket OAuth access token exposed in the build log by Bitbucket Branch Source Plugin
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 GHSA-x8mf-jcmf-r79f.
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-x8mf-jcmf-r79f 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 378,156 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
org.jenkins-ci.plugins:cloudbees-bitbucket-branch-sourceReal-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
Bitbucket Branch Source Plugin 886.v44cf5e4ecec5 and earlier prints the Bitbucket OAuth access token as part of the Bitbucket URL in the build log in some cases.
Bitbucket Branch Source Plugin 887.va_d359b_3d2d8d does not include the Bitbucket OAuth access token as part of the Bitbucket URL in the build log.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source | all versions | 887.vaorg.jenkins-ci.plugins:cloudbees-bitbucket-branch-source:887.va |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.jenkins-ci.plugins:cloudbees-bitbucket-branch-source to 887.va or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-x8mf-jcmf-r79f 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-x8mf-jcmf-r79f can be triaged on real exposure rather than presence alone.
Tailored to GHSA-x8mf-jcmf-r79f. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-x8mf-jcmf-r79f in your dependencies?
O3 Security finds GHSA-x8mf-jcmf-r79f across Maven dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.