An authorization logic error in the External Status Check API in GitLab EE affecting all versions starting from 14.1 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allowed a user to update the status of the check via an API call
https://hackerone.com/reports/1375393
https://gitlab.com/gitlab-org/gitlab/-/issues/343604
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39943.json