Woocommerce Blocker Lite <= 2.1.5 - Cross-Site Request Forgery

The Woocommerce Blocker Lite plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.1.5. This is due to missing nonce validation on several of the plugin's functions like wcblu_custom_add_update_options(), wcblu_update_general_settings(), and wcblu_update_rules_settings(). This makes it possible for unauthenticated attackers to invoke this function and update the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.