CVE-2025-12669

Improper Control of Generation of Code ('Code Injection') in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.11 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to inject HTML and JavaScript into email notifications sent to other users due to improper input sanitization.

Affected

GitLab

CVSS v3.1 GITLAB

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-05-14

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3368096

Security advisories

• https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released

References

• CVE Record
• NVD entry