The Activity Plus Reloaded for BuddyPress plugin for WordPress is vulnerable to Blind Server-Side Request Forgery in all versions up to, and including, 1.1.1 via the 'ajax_preview_link' function. 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 and can be used to query and modify information from internal services.