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.