Server Error in '/' Application.
A potentially dangerous Request.Form value was detected from the client (ctl00$PlaceHolderMain$WikiField$ctl00$ctl00$TextField_spSave="<div class="External...").
Description: ASP.NET has detected data in the request that is potentially dangerous because it might include HTML markup or script. The data might represent an attempt to compromise the security of your application, such as a cross-site scripting attack. If this type of input is appropriate in your application, you can include code in a web page to explicitly allow it. For more information, see http://go.microsoft.com/fwlink/?LinkID=212874.

Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Form value was detected from the client (ctl00$PlaceHolderMain$WikiField$ctl00$ctl00$TextField_spSave="<div class="External...").

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[HttpRequestValidationException (0x80004005): A potentially dangerous Request.Form value was detected from the client (ctl00$PlaceHolderMain$WikiField$ctl00$ctl00$TextField_spSave="<div class="External...").]
   System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) +417
   System.Web.HttpRequest.ValidateHttpValueCollection(HttpValueCollection collection, RequestValidationSource requestCollection) +279
   System.Web.HttpRequest.get_Form() +59
   Microsoft.SharePoint.SPGlobal.GetParametersFromHttpRequest(SPSite site, Boolean bAuthenticated) +643
   Microsoft.SharePoint.SPGlobal.CreateSPRequestAndSetIdentity(SPSite site, String name, Boolean bNotGlobalAdminCode, String strUrl, Boolean bNotAddToContext, Byte[] UserToken, SPAppPrincipalToken appPrincipalToken, String userName, Boolean bIgnoreTokenTimeout, Boolean bAsAnonymous) +3000
   Microsoft.SharePoint.SPWeb.InitializeSPRequest() +258
   Microsoft.SharePoint.SPWeb.EnsureSPRequest() +299
   Microsoft.SharePoint.SPWeb.get_Request() +27
   Microsoft.SharePoint.WebControls.SPControl.EnsureSPWebRequest(SPWeb web) +240
   Microsoft.SharePoint.WebControls.SPControl.SPWebEnsureSPControl(HttpContext context) +862
   Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.GetContextWeb(HttpContext context) +22
   Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PostResolveRequestCacheHandler(Object oSender, EventArgs ea) +1149
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +209
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +220
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +94

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4069.0