In any realm set with "User (Self) registration" a user that is registered with a username in email format can be "locked out" (denied from logging in) using his username.
{
"cwe_ids": [
"CWE-640"
],
"github_reviewed": true,
"github_reviewed_at": "2024-06-12T19:42:21Z",
"nvd_published_at": null,
"severity": "LOW"
}