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 world of e-commerce development, few scripts are as ubiquitous—and as notoriously vulnerable—as add-cart.php . At first glance, it seems harmless: a simple backend handler that adds a product to a user’s shopping cart. But when you see a URL like https://example.com/add-cart.php?num=1 , alarms should go off for any experienced developer. add-cart.php num
A request to add-cart.php?num=1.1 returns a MySQL error: "Unknown column '1.1' in 'where clause'" — SQL injection confirmed. If you currently have add-cart
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. At first glance, it seems harmless: a simple