CVE-2021-39885

A Stored XSS in merge request creation page in all versions of Gitlab EE starting from 13.7 before 14.1.7, all versions starting from 14.2 before 14.2.5, and all versions starting from 14.3 before 14.3.1 allows an attacker to execute arbitrary JavaScript code on the victim's behalf via malicious approval rule names

• CWE-79

• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39885.jsonVendor Advisory
• https://gitlab.com/gitlab-org/gitlab/-/issues/341140Exploit, Issue Tracking, Vendor Advisory
• https://hackerone.com/reports/1342009Exploit, Permissions Required, Third Party Advisory
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39885.jsonVendor Advisory
• https://gitlab.com/gitlab-org/gitlab/-/issues/341140Exploit, Issue Tracking, Vendor Advisory
• https://hackerone.com/reports/1342009Exploit, Permissions Required, Third Party Advisory

Published

Oct 4, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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