Multiple Page Generator Plugin – MPG < 4.0.6 - Authenticated (Editor+) Server-Side Request Forgery via fileUrl

Description

The Multiple Page Generator Plugin – MPG plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 4.0.5 via the 'mpg_download_file_by_link' function. This makes it possible for authenticated attackers, with editor-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.