[anujnayar]

Hi - It's anuj Nayar from PayPal. I can confirm that through our Bug Bounty Program a researcher reported this suspected vulnerability with our PayPal Express Checkout.

After looking into the issue, we don't think this is in fact a vulnerability. We work closely with our merchants who use Express Checkout to provide them the flexibility they need to complete their transactions in a timely manner so they can offer excellent payments experiences to their customers. We offer robust buyer and seller protection to cover both ends of the transaction and our systems are pretty good at finding and flagging this kind of illegal behavior if a merchant were to start overcharging your customers.