The Multiple Page Generator Plugin – MPG plugin for WordPress is vulnerable to unauthorized modification of and access to data due to a missing capability check on several functions in all versions up to, and including, 4.0.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to invoke those functions intended for admin use resulting in subscribers being able to upload csv files and view the contents of MPG projects.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: