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.
{
"github_reviewed": true,
"github_reviewed_at": "2019-05-29T18:47:56Z",
"nvd_published_at": "2019-05-23T15:30:00Z",
"cwe_ids": [
"CWE-287"
],
"severity": "CRITICAL"
}