GitLab Community and Enterprise Edition 11.x before 11.3.13, 11.4.x before 11.4.11, and 11.5.x before 11.5.4 has Incorrect Access Control.

GitLab CE/EE before 11.3.12, 11.4.x before 11.4.10, and 11.5.x before 11.5.3 allows Directory Traversal in Templates API.

GitLab CE/EE versions 8.18 up to 11.x before 11.3.11, 11.4.x before 11.4.8, and 11.5.x before 11.5.1 have CRLF Injection in Project Mirroring when using the Git protocol.

GitLab EE, versions 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, is vulnerable to an insecure direct object reference vulnerability that allows authenticated, but unauthorized, users to view members and milestone details of private groups.

GitLab CE/EE, versions 8.0 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, would log access tokens in the Workhorse logs, permitting administrators with access to the logs to see another user's token.

GitLab EE, versions 11.4 before 11.4.8 and 11.5 before 11.5.1, is affected by an insecure direct object reference vulnerability that permits an unauthorized user to publish the draft merge request comments of another user.

GitLab EE, versions 8.3 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, is vulnerable to an insecure object reference vulnerability that allows a Guest user to set the weight of an issue they create.

All versions of GitLab prior to 11.5.1, 11.4.8, and 11.3.11 do not send an email to the old email address when an email address change is made.

GitLab EE version 11.5 is vulnerable to a persistent XSS vulnerability in the Operations page. This is fixed in 11.5.1.

GitLab EE, version 11.5 before 11.5.1, is vulnerable to an insecure object reference issue that permits a user with Reporter privileges to view the Jaeger Tracing Operations page.

Gitlab CE/EE, versions 8.6 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an incorrect access control vulnerability that displays to an unauthorized user the title and namespace of a confidential issue.

GitLab CE/EE, versions 8.6 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an access control issue that allows a Guest user to make changes to or delete their own comments on an issue, after the issue was made Confidential.

GitLab CE/EE, versions 10.1 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an insecure direct object reference issue that allows a user to make comments on a locked issue.

GitLab CE/EE, versions 7.6 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an XSS vulnerability in the OAuth authorization page.

GitLab CE/EE, versions 10.3 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an XSS vulnerability in Markdown fields via Mermaid.

GitLab CE 8.17 and later and EE 8.3 and later have a symlink time-of-check-to-time-of-use race condition that would allow unauthorized access to files in the GitLab Pages chroot environment. This is fixed in versions 11.5.1, 11.4.8, and 11.3.11.

GitLab CE/EE, versions 8.18 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an SSRF vulnerability in webhooks.

GitLab CE/EE, versions 11.3 before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an XSS vulnerability in Markdown fields via unrecognized HTML tags.

GitLab CE/EE, versions 8.8 up to 11.x before 11.3.11, 11.4 before 11.4.8, and 11.5 before 11.5.1, are vulnerable to an authorization vulnerability that allows access to the web-UI as a user using a Personal Access Token of any scope.

An issue was discovered in GitLab Community and Enterprise Edition 10.x and 11.x before 11.3.11, 11.4.x before 11.4.8, and 11.5.x before 11.5.1. There is an incorrect access control vulnerability that permits a user with insufficient privileges to promote a project milestone to a group milestone.