CVE-2025-8405 | THREATINT

Description

GitLab has remediated a security issue in GitLab CE/EE affecting all versions from 17.1 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 perform unauthorized actions on behalf of other users by injecting malicious HTML into vulnerability code flow displays.

PUBLISHED Reserved 2025-07-31 | Published 2025-12-11 | Updated 2025-12-12 | Assigner GitLab

HIGH: 8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Problem types

CWE-116: Improper Encoding or Escaping of Output

Product status

Default status

unaffected

17.1 (semver) before 18.4.6

affected

18.5 (semver) before 18.5.4

affected

18.6 (semver) before 18.6.2

affected

Credits

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

References

gitlab.com/gitlab-org/gitlab/-/issues/558214 (GitLab Issue #558214) issue-tracking permissions-required

hackerone.com/reports/3270940 (HackerOne Bug Bounty Report #3270940) technical-description exploit permissions-required

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

cve.org (CVE-2025-8405)

nvd.nist.gov (CVE-2025-8405)

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