CVE-2025-12718 Quick Contact Form <= 8.2.6 - Unauthenticated Open Mail Relay

The Quick Contact Form plugin for WordPress is vulnerable to Open Mail Relay in all versions up to, and including, 8.2.6. This is due to the 'qcfvalidateform' AJAX endpoint allowing a user controlled parameter to set the 'from' email address. This makes it possible for unauthenticated attackers t...