Apache Extended Server Side Includes? Haven't seen XSSI before. What's the I?
I agree, this is not the attack I think of when somebody mentions CSRF. Well, the solution at least isn't. I would be very suspicious of anyone who claimed to solve their CSRF holes by not using arrays.
Cross Site Script Inclusion. The article touches on a lot of things (including CSRF), but the HN title refers specifically to JSON (As well as the link's '#' fragment identifier), and therefore the last section, where it shows an attack site including unprotected JSON through the <script> tag, and unless I'm seriously mistaken, this is the definition of XSSI.
I agree, this is not the attack I think of when somebody mentions CSRF. Well, the solution at least isn't. I would be very suspicious of anyone who claimed to solve their CSRF holes by not using arrays.