The Nested Pages WordPress plugin <= 3.1.15 was vulnerable to Cross-Site Request Forgery via the `npBulkAction`s and `npBulkEdit` `admin_post` actions, which allowed attackers to trash or permanently purge arbitrary posts as well as changing their status, reassigning their ownership, and editing other metadata.
Solution:
The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.