Improper handling of user input in GitLab CE/EE versions 8.3 prior to 14.7.7, 14.8 prior to 14.8.5, and 14.9 prior to 14.9.2 allowed an attacker to exploit a stored XSS by abusing multi-word milestone references in issue descriptions, comments, etc.
https://hackerone.com/reports/1455036
https://gitlab.com/gitlab-org/gitlab/-/issues/352392
https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-1190.json