Add-cart.php Num -

// In the form that calls add-cart $_SESSION['csrf_token'] = bin2hex(random_bytes(32)); echo '<input type="hidden" name="csrf_token" value="'.$_SESSION['csrf_token'].'">'; // In add-cart.php if (!hash_equals($_SESSION['csrf_token'], $_POST['csrf_token'])) die('CSRF attack detected');

// Vulnerable code $id = $_GET['num']; $result = mysqli_query($conn, "SELECT * FROM products WHERE id = $id"); An attacker submits: add-cart.php?num=1 UNION SELECT username, password FROM users-- add-cart.php num

If you currently have add-cart.php?num= in production, stop reading and go audit it now. Your users’ data—and your business—depend on it. // In the form that calls add-cart $_SESSION['csrf_token']