CVE-2025-12734

LOWNVD 3.5
3.5

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 v3
3.5
EG Score
—
EPSS
—
KEV
Not listed

Published

December 11, 2025

Last Modified

December 23, 2025

References (3)

Vendor Advisories for CVE-2025-12734(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Frequently asked(4)

What is CVE-2025-12734?
CVE-2025-12734 is a low vulnerability published on December 11, 2025. 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…
When was CVE-2025-12734 disclosed?
CVE-2025-12734 was first published in the National Vulnerability Database on December 11, 2025, with the most recent update on December 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2025-12734?
CVE-2025-12734 has a CVSS v3 base score of 3.5 (NVD).
How do I remediate CVE-2025-12734?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12734, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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