CVE-2025-2254: 
GitLab vulnerability analysis and mitigation

A cross-site scripting (XSS) vulnerability has been discovered in GitLab CE/EE, identified as CVE-2025-2254. The vulnerability affects all versions from 17.9 before 17.10.8, 17.11 before 17.11.4, and 18.0 before 18.0.2. The issue stems from improper output encoding in the snippet viewer functionality, which could lead to cross-site scripting attacks. This vulnerability has been assigned a CVSS score of 8.7 (HIGH) (NVD, GitLab Release).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). It has been assigned a CVSS v3.1 base score of 8.7 with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N. The technical assessment indicates that the vulnerability requires low attack complexity and limited privileges, but user interaction is required for successful exploitation (NVD).

Under certain conditions, this vulnerability could allow a successful attacker to act in the context of a legitimate user by injecting a malicious script into the snippet viewer. The high CVSS score reflects the potential for significant impact on confidentiality and integrity, though availability is not affected (GitLab Release, Wiz).

GitLab has released security patches to address this vulnerability. Users are strongly recommended to upgrade to versions 17.10.8, 17.11.4, or 18.0.2, depending on their current version. GitLab.com is already running the patched version, and GitLab Dedicated customers do not need to take action (GitLab Release).