CVE-2025-4439

HIGH

GitLab 15.10-17.12, 18.0-18.0.4, 18.1-18.1.2, 18.2-18.2.0 - Authenticated Cross-Site Scripting via CDN-Served Instance

Title source: llm

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 18.0.5, 18.1 before 18.1.3, and 18.2 before 18.2.1 that could have allowed an authenticated user to perform cross-site scripting attacks when the instance is served through certain content delivery networks.

References (2)

Core 2

Core References

Broken Link issue-tracking permissions-required

https://gitlab.com/gitlab-org/gitlab/-/issues/541177

Permissions Required technical-description exploit permissions-required

https://hackerone.com/reports/3120111

Scores

CVSS v3 7.7

EPSS 0.0019

EPSS Percentile 39.9%

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-79

Status published

Products (2)

gitlab/gitlab 18.2 (2 CPE variants)

gitlab/gitlab 15.10.0 - 18.0.5 (2 CPE variants)

Published Jul 23, 2025

Tracked Since Feb 18, 2026