Php Email Form Validation - V3.1 Exploit Jun 2026

The vulnerability exists due to the lack of proper input validation in the mail() function, allowing an attacker to inject arbitrary data, including command-line arguments. This can lead to a remote code execution (RCE) vulnerability, enabling an attacker to execute arbitrary system commands.

$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); if (!filter_var($email, FILTER_VALIDATE_EMAIL)) die("Invalid email"); php email form validation - v3.1 exploit