Hacking and exploiting - How do you deal with any security holes you find?

Question

Today online security is a very important factor. Many businesses are completely based online, and there is tons of sensitive data available to check out only by using your web

Answer 1

I experienced the same like you. I once found an exploit in an oscommerce shop where you could download ebooks without paying. I wrote two mails: 1) Developers of oscommerce, they answered "Known issue, just don't use this paypal module, we won't fix" 2) Shop administrator: no answer at all

Actually I have no idea what's the best way to behave ... maybe even publicate the exploit to force the admins to react.