A Cross Site Request Forgery vulnerability was identified in GitHub Enterprise Server that allowed an attacker to execute unauthorized actions on behalf of an unsuspecting user. A mitigating factor is that user interaction is required. This vulnerability affected GitHub Enterprise Server 3.12.0 and was fixed in versions 3.12.1. This vulnerability was reported via the GitHub Bug Bounty program.
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.