A privilege escalation issue was discovered in GitLab CE/EE 9.0 and later when trigger tokens are not rotated once ownership of them has changed.

An input validation problem was discovered in the GitHub service integration which could result in an attacker being able to make arbitrary POST requests in a GitLab instance's internal network. This vulnerability was addressed in 12.1.2, 12.0.4, and 11.11.6.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 8.13 through 12.6.1. It has Incorrect Access Control.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 9.1 through 12.6.1. It has Incorrect Access Control.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 11.0 through 12.6. It allows Uncontrolled Resource Consumption.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 11.4 through 12.6.1. It has Incorrect Access Control.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 10.8 through 12.6.1. It has Incorrect Access Control.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 12.6. It has Incorrect Access Control.

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 12.3 through 12.6.1. It allows Denial of Service.

In GitLab EE 10.5 through 12.5.3, 12.4.5, and 12.3.8, when transferring a public project to a private group, private code would be disclosed via the Group Search API provided by the Elasticsearch integration.

In GitLab EE 11.3 through 12.5.3, 12.4.5, and 12.3.8, insufficient parameter sanitization for the Maven package registry could lead to privilege escalation and remote code execution vulnerabilities under certain conditions.

GitLab EE 8.4 through 12.5, 12.4.3, and 12.3.6 stored several tokens in plaintext.

GitLab EE 12.3 through 12.5, 12.4.3, and 12.3.6 allows Denial of Service. Certain characters were making it impossible to create, edit, or view issues and commits.

GitLab EE 8.14 through 12.5, 12.4.3, and 12.3.6 has Incorrect Access Control. After a project changed to private, previously forked repositories were still able to get information about the private project through the API.

GitLab EE 8.14 through 12.5, 12.4.3, and 12.3.6 allows XSS in group and profile fields.

GitLab Enterprise Edition (EE) 9.0 and later through 12.5 allows Information Disclosure.

GitLab Enterprise Edition (EE) 8.90 and later through 12.5 has Incorrect Access Control.

GitLab Enterprise Edition (EE) 8.2 and later through 12.5 has Insecure Permissions.

GitLab Enterprise Edition (EE) 11.9 and later through 12.5 has Insecure Permissions.

GitLab Enterprise Edition (EE) 6.7 and later through 12.5 allows SSRF.