Auto Featured Image (Auto Post Thumbnail) < 4.2.0 - Authenticated (Author+) Server-Side Request Forgery

Description

The Auto Featured Image (Auto Post Thumbnail) plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 4.1.7 via the upload_to_library function. This makes it possible for authenticated attackers, with Author-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. On Cloud instances, this issue allows for metadata retrieval.