An issue has been discovered in GitLab CE/EE affecting only version 16.0.0. An unauthenticated malicious user can use a path traversal vulnerability to read arbitrary files on the server when an attachment exists in a public project nested within at least five groups.
https://hackerone.com/reports/1994725
https://gitlab.com/gitlab-org/gitlab/-/issues/412371
https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-2825.json