The Contact Form 7 Redirect & Thank You Page plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'post' parameter in all versions up to, and including, 1.0.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, unauthenticated users can use the wpcf7rgetnonce AJAX action to retrieve a valid nonce for any WordPress action/function.

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, low level users, such as subscribers, could use the importfromdebug AJAX action to install any plugin from the WordPress repository.

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, any authenticated user, such as a subscriber, could use the deleteactionpost AJAX action to delete any post on a target site.

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, any authenticated user, such as a subscriber, could use the various AJAX actions in the plugin to do a variety of things. For example, an attacker could use wpcf7rresetsettings to reset the plugin’s settings, wpcf7raddaction to add actions to a form, and more.

In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, any authenticated user, such as a subscriber, could use the importfromdebug AJAX action to inject PHP objects.