SchedulePress <= 5.1.3 - Unauthenticated Full Path Disclosure

The SchedulePress – Auto Post & Publish, Auto Social Share, Schedule Posts with Editorial Calendar & Missed Schedule Post Publisher plugin for WordPress is vulnerable to Full Path Disclosure in all versions up to, and including, 5.1.3. This is due the plugin utilizing the wpdeveloper library and leaving the demo files in place with display_errors on. This makes it possible for unauthenticated attackers to retrieve the full path of the web application, which can be used to aid other attacks. The information displayed is not useful on its own, and requires another vulnerability to be present for damage to an affected website.