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.

The Marketing Optimizer plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 20200925. This is due to missing or incorrect nonce validation via the admin/main-settings-page.php file. This makes it possible for unauthenticated attackers to update the plugin's settings and inject malicious JavaScript via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.