Seraphinite Post .DOCX Source <= 2.16.9 is vulnerable to Server Side Request Forgery (SSRF) vulnerability

The Seraphinite Post .DOCX Source plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.16.9. This makes it possible for authenticated attackers, with Subscriber-level access and above, to make web requests to arbitrary locations originating from the web application which can be used to query and modify information from internal services.