WP-Advanced-Search <= 3.3.8 - Cross-Site Request Forgery leading to Plugin Settings Updates

The WP-Advanced-Search plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.3.8. This is due to missing or incorrect nonce validation on the 'WP_Advanced_Search_update_pagination', 'WP_Advanced_Search_update_styles', 'WP_Advanced_Search_Autocomplete_Action, and possibly other functions. This makes it possible for unauthenticated attackers to update certain plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.