Add-cart.php Num Jun 2026

This technical write-up explores the common implementation of an add-cart.php script and the security implications of the (quantity) parameter. 🛒 Documentation: add-cart.php add-cart.php

// (Optional) Check if user is logged in. // If not, you might use $_SESSION['cart'] for guest users. // For this article, we assume a logged-in user. $user_id = $_SESSION['user_id']; add-cart.php num

If the victim clicks, their cart is associated with the attacker’s session ID. Later, the attacker can view the cart contents or manipulate the num parameter to change what the victim buys. If the victim clicks