The Redirection for Contact Form 7 plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.2.4 via deserialization of untrusted input in the get_lead_fields function. This makes it possible for unauthenticated attackers to inject a PHP Object. The additional presence of a POP chain in a Contact Form 7 plugin allows attackers to delete arbitrary files. Additionally, in certain server configurations, Remote Code Execution is possible
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.