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logic flaws
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Logic flaws in web applications can lead to serious security vulnerabilities, as demonstrated by research into Cashier-as-a-Service (CaaS) integrations. When merchant websites coordinate payment states with third-party cashiers like PayPal or Amazon Payments, mismatches in internal logic can be exploited. Studies found that popular platforms such as NopCommerce, Interspire, Buy.com, and JR.com contained logic flaws allowing unauthorized transactions. These issues arise from the complexity of synchronizing states across the client, merchant, and payment service. Understanding and testing for logic flaws is critical for developers building secure e-commerce systems, as even prestigious providers like Amazon Payments were affected.
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Windows 7 Web Security: Cashier-as-a-Service(Caas) and How to Shop for Free Online
Web applications increasingly integrate third-party services. The integration introduces new security challenges due to the complexity for an application to coordinate its internal states with those of the component services and the web client across the Internet. In this paper, we study the...- News
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- caas cashier-as-a-service distributed systems dynamic analysis e-commerce fraud prevention information security logic flaws merchant websites merchants online shopping payment methods payment processing research security flaw security policies static analysis third party services web security xiaofeng wang
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