Fraud Prevention For WooCommerce and EDD < 2.3.6 - Subscriber+ Arbitrary Customer Blacklisting

The Fraud Prevention For WooCommerce and EDD WordPress plugin before 2.3.6 does not check that a user is allowed to manage orders before letting them add an order's customer details to the store's fraud blacklist, which could allow users with the Subscriber role and above to prevent arbitrary legitimate customers from placing orders.