Captcha Code <= 2.7 - Cross-Site Request Forgery to Plugin Settings Update

The Captcha Code plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.7. This is due to missing or incorrect nonce validation on the wp_captcha_general_options function. This makes it possible for unauthenticated attackers to update plugin settings, via forged request granted they can trick a site administrator into performing an action such as clicking on a link.