Android validating input data Campaign web site adult visitor submission
SSN, date, currency symbol) while semantic validation should enforce correctness of their values in the specific business context (e.g.
start date is before end date, price is within expected range).
It is very difficult to validate rich content submitted by a user.
For more information on XSS filter evasion please see the XSS Filter Evasion Cheat Sheet.White list validation is appropriate for all input fields provided by the user.White list validation involves defining exactly what IS authorized, and by definition, everything else is not authorized.Please note, email addresses should be considered to be public data.Many web applications contain computationally expensive and inaccurate regular expressions that attempt to validate email addresses.