Google Sheet Connector for Easy Digital Downloads <= 1.6.5 is vulnerable to Cross-Site Request Forgery to Access Code Update vulnerability

The Easy Digital Downloads Google Sheet Connector plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.6.5. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to update the access code granted they can trick a site administrator into performing an action such as clicking on a link.