An issue has been discovered in GitLab affecting all versions from 15.5 before 15.8.5, all versions starting from 15.9 before 15.9.4, all versions starting from 15.10 before 15.10.1. Due to improper permissions checks it was possible for an unauthorised user to remove an issue from an epic.
https://gitlab.com/gitlab-org/gitlab/-/issues/385434
https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-1071.json