In MediaWiki before 1.31.9 and 1.32.x through 1.34.x before 1.34.3, Special:UserRights exposes the existence of hidden users.
{
"nvd_published_at": "2020-09-27T21:15:00Z",
"github_reviewed_at": "2024-05-17T21:56:30Z",
"cwe_ids": [],
"severity": "MODERATE",
"github_reviewed": true
}