Nested Pages <= 3.1.15 is vulnerable to Cross-Site Request Forgery (CSRF) vulnerability leading to Arbitrary Post Deletion and Modification

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.