CVE-2021-21665
HIGHCVE-2021-21665 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in com.xebialabs.deployit.ci:deployit-plugin. O3 Security confirms whether CVE-2021-21665 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
CSRF vulnerability in Jenkins XebiaLabs XL Deploy Plugin allows capturing credentials
Real-World Exposure
com.xebialabs.deployit.ci:deployit-pluginReal-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 request forgery (CSRF) vulnerability in Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier allows attackers to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing Username/password credentials stored in Jenkins.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.xebialabs.deployit.ci:deployit-plugin | all versions | 10.0.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.xebialabs.deployit.ci:deployit-plugin. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update com.xebialabs.deployit.ci:deployit-plugin to 10.0.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-21665 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 pinpoints whether CVE-2021-21665 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2021-21665. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2021-21665 in your dependencies?
O3 detects CVE-2021-21665 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.