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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2.2 before 18.5.5, 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an authenticated user to achieve stored cross-site scripting by exploiting GitLab Flavored Markdown.

PUBLISHED Reserved 2025-08-20 | Published 2026-01-09 | Updated 2026-01-10 | 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

18.2.2 (semver) before 18.5.5
affected

18.6 (semver) before 18.6.3
affected

18.7 (semver) before 18.7.1
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/562561 (GitLab Issue #562561) issue-tracking permissions-required

hackerone.com/reports/3297483 (HackerOne Bug Bounty Report #3297483) technical-description exploit permissions-required

about.gitlab.com/...07/patch-release-gitlab-18-7-1-released/

cve.org (CVE-2025-9222)

nvd.nist.gov (CVE-2025-9222)

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