GitLab Community Edition (CE) and Enterprise Edition (EE) before 8.17.8, 9.0.x before 9.0.13, 9.1.x before 9.1.10, 9.2.x before 9.2.10, 9.3.x before 9.3.10, and 9.4.x before 9.4.4 might allow remote attackers to execute arbitrary code via a crafted SSH URL in a project import.
GitLab Enterprise Edition (EE) before 8.17.7, 9.0.11, 9.1.8, 9.2.8, and 9.3.8 allows an authenticated user with the ability to create a project to use the mirroring feature to potentially read repositories belonging to other users.
GitLab before 8.14.9, 8.15.x before 8.15.6, and 8.16.x before 8.16.5 has XSS via a SCRIPT element in an issue attachment or avatar that is an SVG document.