CVE-2021-22242: GitLab

Medium severity, CVSS 5.4. EPSS: 63.6% chance of exploitation in the next 30 days.

Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown

Affected products

• GitLab GitLab: from 11.4.0, before 13.12.9 (fixed in 13.12.9); from 14.0.0, before 14.0.7 (fixed in 14.0.7); from 14.1.0, before 14.1.2 (fixed in 14.1.2)

Published 2021-08-25. Last modified 2026-06-17.