CVE-2025-8405

HIGH

GitLab CE/EE <18.4.6-18.6.2 - Privilege Escalation

Title source: llm

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)

[Release Notes, Vendor Advisory] https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/

[Broken Link] https://gitlab.com/gitlab-org/gitlab/-/issues/558214

[Permissions Required] https://hackerone.com/reports/3270940

Scores

CVSS v3 7.7

EPSS 0.0001

EPSS Percentile 1.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

Classification

CWE

CWE-116

Status published

Affected Products (2)

gitlab/gitlab < 18.4.6

gitlab/gitlab < 18.4.6

Timeline

Published Dec 11, 2025

Tracked Since Feb 18, 2026