An issue has been discovered in GitLab CE/EE affecting all versions starting from 13.7.9 before 13.8.7, all versions starting from 13.9 before 13.9.5, and all versions starting from 13.10 before 13.10.1. A specially crafted Wiki page allowed attackers to read arbitrary files on the server.
https://hackerone.com/reports/1098793
https://gitlab.com/gitlab-org/gitlab/-/issues/320919
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22203.json