XML : Is it possible to fetch data from an RSS Feed without an Access-Control-Allow-Origin header?

I have to fetch data from a RSS feed but the problem is that there is no Access-Control-Allow-Origin header to permit us to read data.

I have tried:

          function createCORSRequest(method, url){          var xhr = new XMLHttpRequest();          // if ("withCredentials" in xhr){          if (xhr.withCredentials == true){              xhr.open(method, url, true);          } else if (typeof XDomainRequest != "undefined"){              xhr = new XDomainRequest();              xhr.open(method, url);          } else {              xhr = null;          }          return xhr;      }        function fetchData() {          var request = createCORSRequest("get", "http://example.com/data");          if (request){              // request.onload = function() {              //     console.log(request);              // };              request.onreadystatechange = function() {                  if (request.readyState == 4 && request.status == 200) {                      console.log(request.responseText);                  }              };              request.send();          }      }    

But it still has this error:

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

I have also tried Ajax but still not working. Is there any other way?

Please note that we are not allowed to use jQuery or any other plug-ins and framework. It has to be written only in JavaScript. Please don't ask why as it is a topic that even I can't answer.