A Reflected Cross-Site Scripting vulnerability allowed the execution of arbitrary Javascript code on the Static Site Editor in GitLab CE/EE 12.10 and later through 13.0.1
https://hackerone.com/reports/864356
https://gitlab.com/gitlab-org/gitlab/-/issues/216528
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13269.json