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Input validation testing is split into the following categories: Testing for Cross site scripting Cross Site Scripting (XSS) testing checks if it is possible to manipulate the input parameters of the application so that it generates malicious output.
Testers find an XSS vulnerability when the application does not validate their input and creates an output that is under their control.
HTTP Verb Tampering is described in 4.8.3 Testing for HTTP Verb Tampering (OTG-INPVAL-003) and HTTP Parameter testing techniques are presented in 4.8.4 Testing for HTTP Parameter pollution (OTG-INPVAL-004) 4.8.5 SQL Injection (OTG-INPVAL-005) SQL injection testing checks if it is possible to inject data into the application so that it executes a user-controlled SQL query in the back-end database.Since client side validation is limited in its utility, we'll concentrate for the rest of this paper on server side validation.Either they fill out a form, or they click on a link that's supposed to take them somewhere.In this white paper, we're going to explore the different types of data validation, and what they can be used for.It's usefulness ranges from improving user experience to ensuring that data is in a form that can be used to security.
While this may be more difficult to do using things like Flash or Silverlight, it can still be done.