CVE-2025-12734

low

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.

References

https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/

https://hackerone.com/reports/3379381

https://gitlab.com/gitlab-org/gitlab/-/issues/579573

Details

Source: Mitre, NVD

Published: 2025-12-11

Updated: 2025-12-23

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 3.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Severity: Low

EPSS

EPSS: 0.00012