A Cross-Site Request Forgery vulnerability in GitHub Enterprise Server allowed write operations on a victim-owned repository by exploiting incorrect request types. A mitigating factor is that the attacker would have to be a trusted GitHub Enterprise Server user, and the victim would have to visit a tag in the attacker's fork of their own repository. vulnerability affected all versions of GitHub Enterprise Server prior 3.14 and was fixed in version 3.13.1, 3.12.6, 3.11.12, 3.10.14, and 3.9.17. This vulnerability was reported via the GitHub Bug Bounty program.

A Denial of Service vulnerability was identified in GitHub Enterprise Server that allowed an attacker to cause unbounded resource exhaustion by sending a large payload to the Git server. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.14 and was fixed in version 3.13.1, 3.12.6, 3.11.12, 3.10.14, and 3.9.17. This vulnerability was reported via the GitHub Bug Bounty program.

An improper privilege management vulnerability allowed users to migrate private repositories without having appropriate scopes defined on the related Personal Access Token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.14 and was fixed in version 3.13.1, 3.12.6, 3.11.12, 3.10.14, and 3.9.17.

A Server-Side Request Forgery vulnerability was identified in GitHub Enterprise Server that allowed an attacker with the Site Administrator role to gain arbitrary code execution capability on the GitHub Enterprise Server instance. Exploitation required authenticated access to GitHub Enterprise Server as a user with the Site Administrator role. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.13 and was fixed in versions 3.12.5, 3.11.11, 3.10.13, and 3.9.16. This vulnerability was reported via the GitHub Bug Bounty program.

An authentication bypass vulnerability was present in the GitHub Enterprise Server (GHES) when utilizing SAML single sign-on authentication with the optional encrypted assertions feature. This vulnerability allowed an attacker to forge a SAML response to provision and/or gain access to a user with site administrator privileges. Exploitation of this vulnerability would allow unauthorized access to the instance without requiring prior authentication. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.13.0 and was fixed in versions 3.9.15, 3.10.12, 3.11.10 and 3.12.4. This vulnerability was reported via the GitHub Bug Bounty program.

A race condition in GitHub Enterprise Server allowed an existing admin to maintain permissions on a detached repository by making a GraphQL mutation to alter repository permissions while the repository is detached. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.13 and was fixed in versions 3.9.13, 3.10.10, 3.11.8 and 3.12.1. This vulnerability was reported via the GitHub Bug Bounty program.

A server side request forgery vulnerability was identified in GitHub Enterprise Server that allowed an attacker with an editor role in the Management Console to gain admin access to the appliance when configuring the Artifacts & Logs and Migrations Storage. Exploitation of this vulnerability required access to the GitHub Enterprise Server instance and access to the Management Console with the editor role. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.12 and was fixed in versions 3.12.2, 3.11.8, 3.10.10, and 3.9.13. This vulnerability was reported via the GitHub Bug Bounty program.

A command injection vulnerability was identified in GitHub Enterprise Server that allowed an attacker with an editor role in the Management Console to gain admin SSH access to the instance when configuring the chat integration. Exploitation of this vulnerability required access to the GitHub Enterprise Server instance and access to the Management Console with the editor role. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.12 and was fixed in versions 3.12.2, 3.11.8, 3.10.10, and 3.9.13. This vulnerability was reported via the GitHub Bug Bounty program.

An Improper Privilege Management vulnerability was identified in GitHub Enterprise Server that allowed an attacker to use a deploy key pertaining to an organization to bypass an organization ruleset. An attacker would require access to a valid deploy key for a repository in the organization as well as repository administrator access. This vulnerability affected versions of GitHub Enterprise Server 3.11 to 3.12 and was fixed in versions 3.11.8 and 3.12.2. This vulnerability was reported via the GitHub Bug Bounty program.

An Improper Privilege Management vulnerability was identified in GitHub Enterprise Server that allowed an attacker to use the Enterprise Actions GitHub Connect download token to fetch private repository data. An attacker would require an account on the server instance with non-default settings for GitHub Connect. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.12 and was fixed in versions 3.8.16, 3.9.11, 3.10.8, and 3.11.6. This vulnerability was reported via the GitHub Bug Bounty program.