CVE-2026-0686 Webmention <= 5.6.2 - Unauthenticated Blind Server-Side Request Forgery

The Webmention plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.6.2 in the 'MF2::parseauthorpage' function via the 'Receiver::post' function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations...