A Cross Site Scripting (XSS) vulnerability in GitLab-EE affecting all versions from 16.6 prior to 17.7.6, 17.8 prior to 17.8.4, and 17.9 prior to 17.9.1 allows an attacker to bypass security controls and execute arbitrary scripts in a user’s browser under specific conditions. This is a high severity issue (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N, 7.7). It is now mitigated in the latest release and is assigned CVE-2025-0555.