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Asked: 2026-05-12T00:08:00+00:00

I am using Master Pages in an ASP.NET MVC app that lets you submit

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I am using Master Pages in an ASP.NET MVC app that lets you submit HTML data as part of a form. Even when I set 

<%@ Page ValidateRequest="false" %>

Or set

<pages validateRequest="false">
...
</pages>

in my web.config file i still get the same error:

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

Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.

I am using ASP.NET Master Pages within an MVC app.

Any thoughts? See this related question.

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1 Answer

  1. Editorial Team

    In asp.net MVC validation occurs at the controller level rather than page, applying attribute [ValidateInput(false)] to the controller action should help

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