Comment Blacklist Updater < 1.2.0 - Cross-Site Request Forgery via update_blacklist_manual

Description

The Comment Blacklist Updater plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.0. This is due to missing or incorrect nonce validation on the 'update_blacklist_manual' function. This makes it possible for unauthenticated attackers to 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.