URL Media Uploader <= 1.0.0 - Authenticated (Author+) Server-Side Request Forgery via DNS Rebinding

The URL Media Uploader plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.0.0 via the 'url_media_uploader_url_upload' action. 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.