The WP Directorybox Manager plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.5. This is due to incorrect authentication in the 'wp_dp_parse_request' function. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator.
The product requires authentication, but the product has an alternate path or channel that does not require authentication.