Server Error in '/Login' Application.

A potentially dangerous Request.QueryString value was detected from the client (retUrl="...bouw.be/>u</a><a href=").

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.QueryString value was detected from the client (retUrl="...bouw.be/>u</a><a href=").

Source Error:


[No relevant source lines]

Source File: c:\net_tmp\login\ac046413\91baeeaf\App_Web_login.aspx.cdcab7d2.crpz4hu3.0.cs    Line: 0

Stack Trace:


[HttpRequestValidationException (0x80004005): A potentially dangerous Request.QueryString value was detected from the client (retUrl="...bouw.be/>u</a><a href=").]
   System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) +9933608
   System.Web.<>c__DisplayClass280_0.<ValidateHttpValueCollection>b__0(String key, String value) +22
   System.Web.HttpValueCollection.EnsureKeyValidated(String key) +9931617
   System.Web.HttpValueCollection.Get(String name) +17
   System.Collections.Specialized.NameValueCollection.get_Item(String name) +12
   ATS.Utilities.ConfigHelper.GetReturnURLFromQueryString() +174
   ATS.Utilities.ConfigHelper.getDestination(LoginPageType pageType) +119
   ATS.Controls.Login.LoginForm.OnLoad(EventArgs e) +652
   System.Web.UI.Control.LoadRecursive() +59
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Control.LoadRecursive() +131
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6569
   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +245
   System.Web.UI.Page.ProcessRequest() +72
   System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +22
   System.Web.UI.Page.ProcessRequest(HttpContext context) +58
   ASP.login_aspx.ProcessRequest(HttpContext context) in c:\net_tmp\login\ac046413\91baeeaf\App_Web_login.aspx.cdcab7d2.crpz4hu3.0.cs:0
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +188
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +48
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +71


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4076.0