phpMyFAQ: Path Traversal in Client::deleteClientFolder enables arbitrary directory deletion by non-super-admin admins

Summary Client::deleteClientFolder in phpmyfaq/src/phpMyFAQ/Instance/Client.php:583 takes a URL from the caller, strips the https:// prefix, and passes the remainder to Filesystem::deleteDirectory relative to the multisite clientFolder. No path-traversal validation runs. An admin with the...