Restricting frontend login to specific users, organized in different storage folders (partitions), can be bypassed. A potential attacker might use this ambiguity in usernames to get access to a different account - however, credentials must be known to the adversary.
Update to TYPO3 versions 8.7.49 ELTS, 9.5.38 ELTS, 10.4.33, 11.5.20, 12.1.1 that fix the problem described above.
{
"github_reviewed_at": "2022-12-13T17:04:02Z",
"github_reviewed": true,
"cwe_ids": [
"CWE-287",
"CWE-302"
],
"nvd_published_at": "2022-12-14T08:15:00Z",
"severity": "MODERATE"
}