An issue has been discovered in GitLab affecting versions prior to 13.1.2, 13.0.8 and 12.10.13. GitLab was vulnerable to a stored XSS by using the PyPi files API.
https://gitlab.com/gitlab-org/gitlab/-/issues/215640
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13328.json