Missing permission check in Jenkins XebiaLabs XL Deploy Plugin allows enumerating credentials IDs

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2021-21662: 0.95% estimated exploitation activity in the next 30 days; percentile 61.27 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier does not perform a permission check in a method implementing form validation. This allows attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins. Those can be used as part of an attack to capture the credentials using another vulnerability. An enumeration of credentials IDs in XebiaLabs XL Deploy Plugin 10.0.2 requires the appropriate permissions.

Published by the source

24 May 2022, 22:01 UTC

Last modified by the source

22 Dec 2023, 13:45 UTC

Source last checked

26 Oct 2026, 16:24 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-h246-g39x-7vmx

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# Patch Next advisory brief: CVE-2021-21662

Advisory: Missing permission check in Jenkins XebiaLabs XL Deploy Plugin allows enumerating credentials IDs
IDs: CVE-2021-21662, GHSA-h246-g39x-7vmx
Record: https://patchnext.com/advisories/cve-2021-21662 (revision 1, source checked 26 Oct 2026, 16:24 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: com.xebialabs.deployit.ci:deployit-plugin 10.0.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven com.xebialabs.deployit.ci:deployit-plugin: affected <= 10.0.1; fixed in 10.0.2

## Suggested inspection (read-only)
- Maven com.xebialabs.deployit.ci:deployit-plugin: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on com.xebialabs.deployit.ci:deployit-plugin.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-h246-g39x-7vmx (GitHub-reviewed advisory GHSA-h246-g39x-7vmx lists affected ranges: Maven com.xebialabs.deployit.ci:deployit-plugin >=0 <=10.0.1)

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