An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.8 before 14.9.5, all versions starting from 14.10 before 14.10.4, all versions starting from 15.0 before 15.0.1. It may be possible for a subgroup member to access the members list of their parent group.
https://gitlab.com/gitlab-org/gitlab/-/issues/353730
https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-1821.json