A potentially dangerous Request.Form value was detected from the client

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I am working on a MVC application, In that I need to insert a value of html tag to be inserted in database. and I used textarea control, but I have found the error

A potentially dangerous Request.Form value was detected from the client (Body="

fa g

gas <...").

What should I need to do to resolve this.

I tried validaterequest in both on page and web.config with <httpRuntime requestValidationMode="2.0"/>

Posted 10-Sep-13 4:04am

amolpatil2243

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norbitrial · Answer 1 · 2013-09-10T04:16:00

Solution 1

Have you checked this[^]? Maybe it can help.

Posted 10-Sep-13 4:16am

norbitrial

amolpatil2243 · Answer 2 · 2013-09-10T04:28:00

Solution 2

http://stackoverflow.com/questions/2959345/error-a-potentially-dangerous-request-form-value-was-detected-from-the-client[^]

This link helped me to solve the problem.

Posted 10-Sep-13 4:28am

amolpatil2243

fixthebugg · Answer 3 · 2013-09-10T04:33:00

First check this link : https://www.owasp.org/index.php/Top_10_2013-A3-Cross-Site_Scripting_(XSS)[^]

I would recommend doing it on a single page rather than disabling it for entire application like this:

In web-config:

XML

<location path="test.aspx">
  <system.web>
    <httpruntime requestvalidationmode="2.0" />
  </system.web>
</location>

and on page :

XML

<@ Page validateRequest="false" %>

after that you can check for the user input from that page pro-actively to avoid any security issues.