An issue was discovered in GitLab Community and Enterprise Edition 9.x, 10.x, and 11.x before 11.5.8, 11.6.x before 11.6.6, and 11.7.x before 11.7.1. It has Incorrect Access Control. A user retains their role within a project in a private group after being removed from the group, if their privileges within the project are different from the group.

An issue was discovered in GitLab Community and Enterprise Edition before 11.6.10, 11.7.x before 11.7.6, and 11.8.x before 11.8.1. It has Incorrect Access Control (issue 5 of 5).

An issue has been discovered in GitLab affecting all versions starting from 12.8 before 15.8.5, all versions starting from 15.9 before 15.9.4, all versions starting from 15.10 before 15.10.1. A specially crafted payload could lead to a reflected XSS on the client side which allows attackers to perform arbitrary actions on behalf of victims on self-hosted instances running without strict CSP.

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.

An XSS vulnerability exists in GitLab CE/EE affecting all versions from 13.3 prior to 17.6.5, 17.7 prior to 17.7.4 and 17.8 prior to 17.8.2 that allows an attacker to execute unauthorized actions via a change page.

GitLab versions 8.9.x and above contain a critical security flaw in the "import/export project" feature of GitLab. Added in GitLab 8.9, this feature allows a user to export and then re-import their projects as tape archive files (tar). All GitLab versions prior to 8.13.0 restricted this feature to administrators only. Starting with version 8.13.0 this feature was made available to all users. This feature did not properly check for symbolic links in user-provided archives and therefore it was possible for an authenticated user to retrieve the contents of any file accessible to the GitLab service account. This included sensitive files such as those that contain secret tokens used by the GitLab service to authenticate users. GitLab CE and EE versions 8.13.0 through 8.13.2, 8.12.0 through 8.12.7, 8.11.0 through 8.11.10, 8.10.0 through 8.10.12, and 8.9.0 through 8.9.11 are affected.

An issue has been discovered in GitLab CE/EE affecting all versions from 15.10 before 17.3.6, 17.4 before 17.4.3, and 17.5 before 17.5.1. An attacker could inject HTML into the Global Search field on a diff view leading to XSS.

An issue has been discovered in GitLab CE/EE affecting all versions before 15.5.7, all versions starting from 15.6 before 15.6.4, all versions starting from 15.7 before 15.7.2. A race condition can lead to verified email forgery and takeover of third-party accounts when using GitLab as an OAuth provider.

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.

An issue has been discovered in GitLab EE affecting all versions starting from 16.0 prior to 17.2.8, from 17.3 prior to 17.3.4, and from 17.4 prior to 17.4.1. An AI feature was found to read unsanitized content in a way that could have allowed an attacker to hide prompt injection.

GitLab Community Edition (CE) and Enterprise Edition (EE) before 9.0.11, 9.1.8, 9.2.8 allow an authenticated user with the ability to create a group to add themselves to any project that is inside a subgroup.

An issue has been discovered in GitLab EE that allows for cross-site-scripting attack and content security policy bypass in a user's browser under specific conditions, affecting all versions from 16.6 before 17.9.7, 17.10 before 17.10.5, and 17.11 before 17.11.1.

An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.4 before 14.5.4, all versions starting from 14.6 before 14.6.4, all versions starting from 14.7 before 14.7.1. GitLab search may allow authenticated users to search other users by their respective private emails even if a user set their email to private.

A vulnerability was discovered in GitLab versions prior to 13.1. Under certain conditions the private activity of a user could be exposed via the API.

An issue has been discovered in GitLab before version 12.10.13 that allowed a project member with limited permissions to view the project security dashboard.

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

A Denial of Service (DoS) condition has been discovered in GitLab CE/EE affecting all versions starting with 12.6 before 17.0.6, 17.1 prior to 17.1.4, and 17.2 prior to 17.2.2. It is possible for an attacker to cause a denial of service using crafted adoc files.

Improper authorization checks in GitLab EE > 13.11 allows subgroup members to see epics from all parent subgroups.

An issue has been discovered in GitLab CE/EE affecting all versions from 11.6 before 17.10.7, 17.11 before 17.11.3, and 18.0 before 18.0.1. A Discord webhook integration may cause DoS.

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.