Description
GitLab has remediated a security issue in GitLab CE/EE affecting all versions from 17.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to perform unauthorized actions on behalf of other users by injecting malicious HTML into vulnerability code flow displays.
References (3)
Core 3
Core References
Broken Link issue-tracking
permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/558214
Permissions Required technical-description
exploit
permissions-required
https://hackerone.com/reports/3270940
Release Notes, Vendor Advisory
https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/
Scores
CVSS v3
7.7
EPSS
0.0049
EPSS Percentile
37.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-116
Status
published
Products (1)
gitlab/gitlab
17.1.0 - 18.4.6 (2 CPE variants)
Published
Dec 11, 2025
Tracked Since
Feb 18, 2026