The WordPress Simple Shopping Cart plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.1.3 via the 'process_payment_data' due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to change the quantity of a product to a negative number, which subtracts the product cost from the total order cost. The attack will only work with Manual Checkout mode, as PayPal and Stripe will not process payments for a negative quantity.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Wordpress Simple Paypal Shopping Cart Plugin | — | Update wordpress-simple-paypal-shopping-cart plugin to version 5.1.4, or a newer patched version | May 15, 2025 | Apr 30, 2025 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub