A cross-site scripting issue has been discovered in GitLab CE/EE affecting all versions starting from 15.2 before 15.2.5, all versions starting from 15.3 before 15.3.4, all versions starting from 15.4 before 15.4.1 It was possible to exploit a vulnerability in the external status checks feature which could lead to a stored XSS that allowed attackers to perform arbitrary actions on behalf of victims at client side.
https://hackerone.com/reports/1628009
https://gitlab.com/gitlab-org/gitlab/-/issues/367408
https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-2904.json