Imgur: Persistent XSS in https://p.imgur.com/albumview.gif and http://p.imgur.com/imageview.gif / post statistics

In p.imgur.com/albumview.gif, a post paramater could be set containing html and javascript. This was not escaped properly and the code would be executed. The reporter used the following example URLs as a proof of concept https://p.imgur.com/albumview.gif?a=F78FO&r=https://community.imgur.com/aler...