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Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an unauthenticated user to execute arbitrary code in the context of an authenticated user's browser by convincing the legitimate user to visit a specially crafted webpage.

PUBLISHED Reserved 2025-11-26 | Published 2026-01-09 | Updated 2026-01-10 | Assigner GitLab




HIGH: 8.0CVSS:3.1/AV:N/AC:H/PR:N/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

18.6 (semver) before 18.6.3
affected

18.7 (semver) before 18.7.1
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/582237 (GitLab Issue #582237) issue-tracking permissions-required

hackerone.com/reports/3441368 (HackerOne Bug Bounty Report #3441368) technical-description exploit permissions-required

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

cve.org (CVE-2025-13761)

nvd.nist.gov (CVE-2025-13761)

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