CVE-2025-12734 | THREATINT

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 leak sensitive information from specifically crafted merge request titles.

PUBLISHED Reserved 2025-11-04 | Published 2025-12-11 | Updated 2025-12-11 | Assigner GitLab

LOW: 3.5CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Problem types

CWE-116: Improper Encoding or Escaping of Output

Product status

Default status

unaffected

15.6 (semver) before 18.4.6

affected

18.5 (semver) before 18.5.4

affected

18.6 (semver) before 18.6.2

affected

Credits

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program finder

References

gitlab.com/gitlab-org/gitlab/-/issues/579573 (GitLab Issue #579573) issue-tracking permissions-required

hackerone.com/reports/3379381 (HackerOne Bug Bounty Report #3379381) technical-description exploit permissions-required

about.gitlab.com/...10/patch-release-gitlab-18-6-2-released/

cve.org (CVE-2025-12734)

nvd.nist.gov (CVE-2025-12734)

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