Staying Ahead of Amazon, in Amazon Treasure Hunt Contest
With a simple Man In The Middle (MITM) attack, I tried to cheat(?) one of Amazon India's contest.

I discovered a vulnerability on Gaana.com before the main POC hack
In May, 2015 I found an exploit on Gaana.com, which let me access their entire User Database (more than 10 Million) which included all the user info.