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Description

An issue has been discovered in GitLab CE/EE affecting all versions from 17.6 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2, that, under specific conditions, could have allowed unauthorized users to view confidential branch names by accessing project issues with related merge requests.

PUBLISHED Reserved 2025-07-02 | Published 2025-11-15 | Updated 2025-11-17 | Assigner GitLab




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-201: Insertion of Sensitive Information Into Sent Data

Product status

Default status
unaffected

17.6 (semver) before 18.3.6
affected

18.4 (semver) before 18.4.4
affected

18.5 (semver) before 18.5.2
affected

Credits

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

References

about.gitlab.com/...12/patch-release-gitlab-18-5-2-released/

gitlab.com/gitlab-org/gitlab/-/issues/553129 (GitLab Issue #553129) issue-tracking permissions-required

hackerone.com/reports/3214025 (HackerOne Bug Bounty Report #3214025) technical-description exploit permissions-required

cve.org (CVE-2025-7000)

nvd.nist.gov (CVE-2025-7000)

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