Chapter 3. Introduction to Server Side Input Validation Issues
Introduction
Server Side Input Validation Vulnerabilities are a class of vulnerabilities that are a direct result of a lack of or inadequate sanitization or validation of the integrity of data that is processed by the application. Note the term “Server Side”. In a complex web application, in the user experience, there can be client side cleansing of data and format enforcement such as by JavaScript or other “Client Side” scripting languages. But we as Hackers are taught that this effort is irrelevant because we can modify the request in transit using a man in the middle proxy or by direct URL modification, or creating custom pages ...
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