A few months ago I found a really fine XSS in Google's Custom Search Engine. The trick I needed to use doesn't seem to be broadly known and that's a pity as it sometimes might allow to make unexploitable exploitable. So here it is: XSS via Host header - Internet Explorer only. The trick was discovered by Sergey Bobrov (@Black2Fan) two years ago and still hasn't been fixed in IE11. Details of the b