A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. Project reporters and above could see confidential EPIC attached to confidential issues
https://hackerone.com/reports/919468
https://gitlab.com/gitlab-org/gitlab/-/issues/227820
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13287.json