通过ajax请求发送Facebook图像路径

I am trying to send an image path to my server so that I can copy that image from facebook to my own server. But I am not able to send the image path. It gives me 403 Forbidden error.

$.ajax({
            url:'http://url.com/albums/copyFromFacebook',
            data: { p : path , id : ids},
            type : 'POST',
            success:function(e)
            {
                alert(e);
            }
        });

The p in the data field should contain the path. Whenever I remove this parameter the ajax request works fine. But whenever I put this parameter I get a 403 Forbidden error.

A quick google search returns a few stackoverflow questions similar to yours

403 Forbidden on form submission

403 Forbidden When Posting HTML Tags

Error 403 triggered when posting URL's via form with PHP

With all of them suggesting ModSecurity as a possible culprit