Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 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, under certain conditions, render content in dialogs to other users by injecting malicious HTML content into merge request titles.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 15.6.0, < 18.4.6 |
Related Weaknesses (CWE)
References
- https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-releaseRelease NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/579573Broken Link
- https://hackerone.com/reports/3379381Permissions Required
FAQ
What is CVE-2025-12734?
CVE-2025-12734 is a vulnerability with a CVSS score of 3.5 (LOW). GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.6 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, under certai...
How severe is CVE-2025-12734?
CVE-2025-12734 has been rated LOW with a CVSS base score of 3.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-12734?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.