CVE-2025-4439

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

State: Published
Severity: 7.7 High
Published: Jul 23, 2025
Updated: Feb 26, 2026
Reserved: May 8, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N	GitLab

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
GitLabGitLab	15.10 to before 18.0.5Affected 18.1 to before 18.1.3Affected 18.2 to before 18.2.1Affected

References

GitLab Issue #541177issue-trackingpermissions-required
HackerOne Bug Bounty Report #3120111technical-descriptionexploitpermissions-required

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