Buildbot before 1.8.2 and 2.x before 2.3.1 accepts a user-submitted authorization token from OAuth and uses it to authenticate a user. If an attacker has a token allowing them to read the user details of a victim, they can login as the victim.
{ "nvd_published_at": "2019-05-23T15:30:00Z", "cwe_ids": [ "CWE-287" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2019-05-29T18:47:56Z" }