Provide references for CVE-2021-39889.
Where can I find more information about CVE-2021-39889?
References are available at: https://gitlab.com/gitlab-org/gitlab/-/issues/338062, https://hackerone.com/reports/1294017, https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39889.json.