iChart < 2.2.4 - Subscriber+ Arbitrary Post Read, Update and Deletion via IDOR

The iChart WordPress plugin before 2.2.4 does not perform capability or ownership checks in several of its AJAX actions, relying only on a nonce that any logged-in user can obtain, allowing users with a role as low as Subscriber to read, modify and permanently delete arbitrary posts and to overwrite a site-wide option.