If you are in India and looked for buying something online, then you would probably heard about Infibeam.com shopping site. When I was using the site to place an order I found a Unvalidated URL Redirection. Here is the story how I reported, what they replied and how it got fixed finally.
The Story :
This article has been migrated to The dark w3b, a Web Application Information Security dedicated blog by Pavan.
Read the article here: Unvalidated Redirect found on infibeam.com