Exception

Explanation

The reason why you are getting this error is because while trying to access a JsonResult response via a GET request, ASP.NET MVC protects you from JSON Hijacking. for more information about this vulnerability, see this entry.

Solution

There are two workarounds for this exception:

• Keep on accessing the action method via a POST request.
• Allow HTTP GET requests by using JsonRequestBehavior enumeration like this:
  
  

  public JsonResult Test()
  {
      string sensitiveInfo = "######";
  
      return Json(sensitiveInfo, JsonRequestBehavior.AllowGet);
  }