WP EasyCart <= 5.4.8 - Cross-Site Request Forgery via process_duplicate_product

The WP EasyCart plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 5.4.8. This is due to missing or incorrect nonce validation on the process_duplicate_product function. This makes it possible for unauthenticated attackers to duplicate products via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.