A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. Under certain conditions GitLab was not properly revoking user sessions and allowed a malicious user to access a user account with an old password.
https://hackerone.com/reports/437194
https://gitlab.com/gitlab-org/gitlab/-/issues/25195
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13302.json