Php Email Form Validation - V3.1 Exploit 'link' Link

This post highlights the critical security vulnerability discovered in the PHP Email Form Validation v3.1

// 3. Hardcoded headers (no user input allowed in headers!) $to = "admin@example.com"; $subject = "Contact Form: " . mb_substr($name, 0, 50); // Truncate to prevent overflow $headers = "From: noreply@yourdomain.com\r\n"; $headers .= "Reply-To: " . $email . "\r\n"; // Email already validated $headers .= "Content-Type: text/plain; charset=UTF-8\r\n"; $headers .= "X-Sender-IP: " . $_SERVER['REMOTE_ADDR'] . "\r\n"; php email form validation - v3.1 exploit