An attacker inserts newline characters ( \r\n or %0A%0D ) into a form field like "Subject" or "Name".
: An attacker submits a specially crafted email address containing shell metacharacters or extra arguments, such as attacker\" -oQ/tmp/ -X/var/www/cache/phpcode.php some\"@email.com . php email form validation - v3.1 exploit
attacker@example.com%0aCC: victims@example.com An attacker inserts newline characters ( \r\n or
The PHP Email Form Validation - v3.1 has been found to have a critical vulnerability that allows attackers to exploit the system, potentially leading to severe consequences. This review aims to provide an in-depth analysis of the exploit and highlight the necessary steps to mitigate the risk. FILTER_VALIDATE_EMAIL)) die("Invalid email")
$email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); if (!filter_var($email, FILTER_VALIDATE_EMAIL)) die("Invalid email");