There are some payment solutions where you don't even need to fill in the CVC. (I've ordered on Amazon a few years ago without needing to fill it in) Besides that, there were a couple people last year(s) who showed that you can obtain the CVC in an instant by submitting CVC's from 0 to 999, with the same credit card info, to many websites. (This was tested for Visa I believe)

Edit: See http://www.independent.co.uk/news/uk/crime/criminals-guess-v... / https://news.ycombinator.com/item?id=13099949