A while back I wrote about a subtle JSON vulnerability which could result in the disclosure of sensitive information. That particular exploit involved overriding the JavaScript Array constructor to disclose the payload of a JSON array, something which most browsers do not support now. However, there’s another related exploit that seems to affect many more browsers. It was brought to my attention recently by someone at Microsoft and Scott Hanselman and I demonstrated it at the Norwegian Developers Conference last week, though it has been demonstrated against Twitter in the past. Before I go further, let...