GitLab Community and Enterprise Editions version 9.2 up to 10.4 are vulnerable to XSS because a lack of input validation in the milestones component leads to cross site scripting (specifically, data-milestone-id in the milestone dropdown feature). This is fixed in 10.6.3, 10.5.7, and 10.4.7.
The Auth0 integration in GitLab before 10.3.9, 10.4.x before 10.4.6, and 10.5.x before 10.5.6 has an incorrect omniauth-auth0 configuration, leading to signing in unintended users.
GitLab Community and Enterprise Editions before 10.1.6, 10.2.6, and 10.3.4 are vulnerable to an authorization bypass issue in the Projects::MergeRequests::CreationsController component resulting in an attacker to see every project name and their respective namespace on a GitLab instance.
Gitlab Community and Enterprise Editions version 10.3.3 is vulnerable to an Insecure Temporary File in the project import component resulting remote code execution.
Gitlab Community and Enterprise Editions version 10.1, 10.2, and 10.2.4 are vulnerable to a SQL injection in the MilestoneFinder component resulting in disclosure of all data in a GitLab instance's database.
Gitlab Community Edition version 10.2.4 is vulnerable to a lack of input validation in the GitlabProjectsImportService resulting in remote code execution.
Gitlab Community Edition version 10.3 is vulnerable to a lack of input validation in the system_hook_push queue through web hook component resulting in remote code execution.
Gitlab Community Edition version 10.2.4 is vulnerable to lack of input validation in the CI job component resulting in persistent cross site scripting.
Gitlab Enterprise Edition version 10.3 is vulnerable to an authorization bypass issue in the GitLab Projects::BoardsController component resulting in an information disclosure on any board object.