The Simple Redirection plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.5. This is due to missing or incorrect nonce validation on the settings_page() function. This makes it possible for unauthenticated attackers to update the plugin's settings and redirect all site visitors via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in smp7, wp.Insider Simple Membership After Login Redirection.This issue affects Simple Membership After Login Redirection: from n/a through 1.6.