How I made $2000 in 15 minutes

When I am not hunting I read about startups ,what’s happening in valley. I check their site , as a security guy I cannot control myself from checking their security. In the process , I came across this accounting web application (they are quite famous and making big bucks, I won’t take the name as they might get disturbed after this post. ) I was just testing for common bug XSS,CSRF and all regular stuff.   Every field was vulnerable to XSS and every form was vulnerable to CSRF as  token was not validating . Used Contact Us section from the site. Some non-technical lady replied “Thanks for contacting us , we don’t have any reward scheme or anything” .       Let’s give it one more try, this time I used About US page, googled the name of the engineer , found his Github  account and found his gmail there. He was really nice to me.       Later we had Video chat on Skype , he was explaining me things ,asking me about my background.He was impressed. Following is a copy paste from the original POC that I sent back then   1. XSS:- javascript is not  filtered ,hence any arbitrary javascript code can be executed. Hence with document.cookie , a user’s cookie can be stolen ,that can lead to full account take over.