GitLab Community and Enterprise Editions version 8.3 up to 10.x before 10.3 are vulnerable to SSRF in the Services and webhooks component.

GitLab Community and Enterprise Editions version 8.4 up to 10.4 are vulnerable to XSS because a lack of input validation in the merge request component leads to cross site scripting (specifically, filenames in changes tabs of merge requests). 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 Edition version 10.3 is vulnerable to an improper authorization issue in the deployment keys component resulting in unauthorized use of deployment keys by guest users.

Gitlab Community Edition version 10.3 is vulnerable to an improper authorization issue in the Oauth sign-in component resulting in unauthorized user login.

Gitlab Enterprise Edition version 10.1.0 is vulnerable to an insufficiently protected credential issue in the project service integration API endpoint resulting in an information disclosure of plaintext password.

Gitlab Community Edition version 10.3 is vulnerable to a path traversal issue in the GitLab CI runner component 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 a lack of input validation in the GitlabProjectsImportService resulting in remote code execution.

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 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.

Multiple versions of GitLab expose sensitive user credentials when assigning a user to an issue or merge request. A fix was included in versions 8.15.8, 8.16.7, and 8.17.4, which were released on March 20th 2017 at 23:59 UTC.