Path traversal vulnerability in package upload functionality in GitLab CE/EE starting from 12.8 allows an attacker to save packages in arbitrary locations. Affected versions are >=12.8, <13.3.9,>=13.4, <13.4.5,>=13.5, <13.5.2.
https://hackerone.com/reports/835427
https://gitlab.com/gitlab-org/gitlab/-/issues/247371
https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26405.json