Woocommerce check pincode/zipcode for shipping <= 2.0.4 - Cross-Site Request Forgery to Reflected Cross-Site Scripting

The Woocommerce check pincode/zipcode for shipping plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.0.4. This is due to missing or incorrect nonce validation. This makes it possible for unauthenticated attackers to inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.