A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. Same 2 factor Authentication secret code was generated which resulted an attacker to maintain access under certain conditions.
https://hackerone.com/reports/511260
https://gitlab.com/gitlab-org/gitlab/-/issues/27686
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13304.json