Getting Credit card number (awkward experience)

Source:http://www.tekspecz.com/new-blog-2/2015/3/8/how-a-hackers-can-steal-your-credit-card-information

if you ask, how to found this bug? i will answer with I accidentally found this bug. and you ask me again, how could you possibly get it accidentally?

i got this bug when i spider on a website with burpsuite, and i got sensitive data exposure.

a lot of credit card number(number only not Exp date and cvv) when i report this bug, i got accepted and P2-high, of course I am very happy but 1week after that i got notification from Gmail, i only get point,

However, I am very happy because I get leaderboard on juni.

hahaha that my awkward experience on bug bounty