Bypass 3D payment on any website.

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Secure Payment Systems: Protecting Online Transactions

A well-designed website implements robust security measures to prevent unauthorized access to private or paid content. Weak security can potentially allow bypassing payment by guessing content URLs. This vulnerability often stems from developers failing to properly validate access to all content.

Even some websites using popular CMS platforms like Joomla and WordPress may have security flaws if set up by inexperienced developers, potentially allowing payment pages to be bypassed.

Payment gateways are specifically designed to secure sensitive user information during transactions. They encrypt critical data like credit card numbers and bank account details. The typical payment flow works as follows:
Customer places order and proceeds to checkout
E-commerce site directs to payment gateway
Customer enters payment information
Gateway sends to issuing bank for authorization
Bank verifies sufficient funds
Merchant notified of approval/denial
If approved, merchant requests transaction from bank
Bank processes payment and notifies customer
How Payment Gateways Secure Information
Transactions occur over HTTPS (secure) connections
Hash functions and signed requests validate transactions
Server IP verification detects malicious activity
Virtual Payer Authentication adds an extra security layer
3-D Secure protocol facilitates buyer/seller authentication

1. Modify HTML hidden elementThis method is simpler and used on poorly-secured websites—you just have to manipulate the product amount to buy on the credit card payment page. For this method, check if the item cost is available in the hidden element of the HTML form page of the website. When you select the item to buy, the price is added to the total item amount, taken from the hidden field, and filled into the form. Finally, the total is presented to the buyer. You should have something like:



If the price is secured on the server-side, you can try manipulating the quantity to pay significantly less.

3. Fuzz other parameters
Other parameters you could try fuzzing include:
wallet amount
promo codes
delivery charges

Just look for any parameter involving money and try to tamper with it—this way, you may bypass the credit card payment on that website and shop for free.


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