A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. GitLab Omniauth endpoint allowed a malicious user to submit content to be displayed back to the user within error messages.
https://hackerone.com/reports/438746
https://gitlab.com/gitlab-org/gitlab/-/issues/25201
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13314.json