Add-cart.php Num -

The Hidden Dangers of add-cart.php?num=1: Why Simple Shopping Carts Fail

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.

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