CVE-2025-12029

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

State: Published
Severity: 8.0 High
Published: Dec 11, 2025
Updated: Feb 26, 2026
Reserved: Oct 21, 2025

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.11 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have, under certain circumstances, allowed an unauthenticated user to perform unauthorized actions on behalf of another user by injecting malicious external scripts into the Swagger UI."

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:N/AC:H/PR:N/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	15.11 to before 18.4.6Affected 18.5 to before 18.5.4Affected 18.6 to before 18.6.2Affected

References

GitLab Issue #577975issue-trackingpermissions-required
HackerOne Bug Bounty Report #3317485technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/

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