CVE-2023-30521 — A missing permission check in Jenkins Assembla merge request builder Plugin 1

A missing permission check in Jenkins Assembla merge request builder Plugin 1.1.13 and earlier allows unauthenticated attackers to trigger builds of jobs corresponding to the attacker-specified repository.

01What is this vulnerability?

A missing permission check in Jenkins Assembla merge request builder Plugin 1.1.13 and earlier allows unauthenticated attackers to trigger builds of jobs corresponding to the attacker-specified repository.

02Affected products

Vendor	Product	Versions
Jenkins Project	Jenkins Assembla merge request builder Plugin	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-04-12T17:05:11.466Z
• Last modified: 2025-02-07T18:02:04.778Z

09References

• www.jenkins.io — https://www.jenkins.io/security/advisory/2023-04-12/#SECURITY-2872
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/04/13/3