WatchTowerHQ <= 3.9.6 - Authentication Bypass to Administrator due to Missing Empty Value Check
The WatchTowerHQ plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.9.6. This is due to the 'watchtower_ota_token' default value is empty, and the not empty check is missing in the 'Password_Less_Access::login' function. This makes it possible for unauthenticated attackers to log in to the WatchTowerHQ client administrator user.