The Return Refund and Exchange For WooCommerce – Return Management System, RMA Exchange, Wallet And Cancel Order Features plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.4.5 via several functions due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to overwrite linked refund image attachments, overwrite refund request message, overwrite order messages, and read order messages of other users.
The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.