Vulnerability Discovered in Redirection for Contact Form 7 Plugin <= 2.3.3
https://www.wordfence.comRedirection for Contact Form 7 WordPress plugin has 200,000+ active installations and can be used to redirect to any page you choose after mail sent successfully, firing scripts after submission, save submissions in database, and much more options to make Contact Form 7 poweful. In versions prior to 2.3.3, there are multiple vulnerabilities.
We highly recommend updating to the latest patched version available, 2.3.5, immediately.