if ($quantity <= 0) { // Reject the request die("Error: Quantity must be at least 1."); } Never accept price information from the client. The add-cart.php script should only receive the item_id and the quantity . The script should then query the database to retrieve the actual price of the item. Download Video 3gp Bokep Sama Ibu Ibu Yang Gemuk Tv Shows Is
Imagine a URL structure that looks like this: St-v3600-resetters.exe Upd Apr 2026
// Fetch price from DB $stmt = $pdo->prepare("SELECT price FROM products WHERE id = ?"); $stmt->execute([$item_id]); $product = $stmt->fetch();
If the URL looks like add-cart.php?id=101&price=50 , an attacker might change the price to 0.01 . However, modern applications usually calculate price based on the database ID server-side. The num parameter remains the more persistent threat because applications expect the user to define how many items they want. To secure an add-cart.php script, developers must move all validation logic to the Server-Side . 1. Strict Type Validation Never trust input. The num parameter must be validated to ensure it is a positive integer.
// Secure Code $quantity = intval($_GET['num']);
GET /add-cart.php?item_id=101&num=1&price=50.00 HTTP/1.1 In a vulnerable application, the add-cart.php script simply takes the num (quantity) provided in the URL or POST body and adds it directly to the user's session or database cart without validation. The most common exploitation method for the num parameter involves Integer Underflow or Logic Errors .
In the realm of web application security, few vulnerabilities are as financially impactful as those affecting e-commerce logic. The phrase add-cart.php num is often associated with a classic Parameter Tampering attack. It represents a scenario where a malicious user manipulates the quantity or price of an item in their shopping cart to pay less than the intended price. The Vulnerable Code Pattern This vulnerability arises when an application relies on Client-Side Trust . The server assumes that the data sent by the browser—specifically the num (number/quantity) parameter—is valid and has not been tampered with.
// Vulnerable Code $quantity = $_GET['num']; // If user sends ?num=-5, this is accepted.