An issue has been discovered in GitLab EE affecting all versions starting from 13.7 before 15.2.5, all versions starting from 15.3 before 15.3.4, all versions starting from 15.4 before 15.4.1. A user's primary email may be disclosed to an attacker through group member events webhooks.
https://hackerone.com/reports/1446022
https://gitlab.com/gitlab-org/gitlab/-/issues/364266
https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-3351.json