The Affiliate Plus plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.3.2. This is due to missing or incorrect nonce validation on the 'affiplus_settings' page. This makes it possible for unauthenticated attackers to perform an unauthorized action granted they can trick a site administrator into performing an action such as clicking on a link.
https://wordpress.org/plugins/affiliate-plus/
https://plugins.trac.wordpress.org/browser/affiliate-plus/trunk/affipsettings.php
https://plugins.trac.wordpress.org/browser/affiliate-plus/trunk/affiplus.php