Add-cart.php Num -

$stmt = $conn->prepare("SELECT price, stock FROM products WHERE id = ? AND active = 1"); $stmt->bind_param("i", $product_id); $stmt->execute(); Principle 4: Implement CSRF Tokens Since you are modifying state (the cart), every request must include a unique token.

The attacker crafts add-cart.php?num=12 AND 1=2 UNION SELECT database()-- - . The cart page inadvertently displays the database name (e.g., "vintage_store_db") because the product name lookup fails and falls back to the error message. add-cart.php num

Never trust user input. Always validate data types. Never use GET requests to modify state. And for the love of security, move away from raw add-cart.php scripts and toward modern, token-authenticated POST endpoints. The cart page inadvertently displays the database name (e

An attacker should not be able to call add-cart.php 1000 times per second. Implement a token bucket or store a timestamp in the session: Never use GET requests to modify state

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.