Non-admin users can self-grant permissions that implicitly make them administrators (see GHSA-r9qp-pqx5-8369)

PKSA-335s-36s8-mdj4

Affected package: contao/core-bundle

Affected version: >=5.0.0,<5.3.50|>=5.4.0,<5.7.12

Reported by:
FriendsOfPHP/security-advisories