The Download Manager and Payment Form WordPress Plugin – WP SmartPay plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions 1.1.0 to 2.7.13 via the show() function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to view other user's data like email address, name, and notes.
CWE-200