Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to bypass access control restrictions and view GitLab Pages content intended only for project members by authenticating through OAuth providers.
Problem types
CWE-863: Incorrect Authorization
Product status
17.9 (semver) before 18.3.6
18.4 (semver) before 18.4.4
18.5 (semver) before 18.5.2
Credits
Thanks [mateuszek](https://hackerone.com/mateuszek) for reporting this vulnerability through our HackerOne bug bounty program
References
about.gitlab.com/...12/patch-release-gitlab-18-5-2-released/
gitlab.com/gitlab-org/gitlab/-/issues/556098 (GitLab Issue #556098)
hackerone.com/reports/3250156 (HackerOne Bug Bounty Report #3250156)