title: Worst security hole you've seen?
body: <p>What is the worst security hole you've ever seen? It is probably a good idea to keep details limited to protect the guilty.</p>
  
  <p>For what it's worth, here's a <a href="https://stackoverflow.com/questions/667147/hacking-and-exploiting-how-do-you-deal-with-any-security-holes-you-find">question</a> about what to do if you find a security hole, and <a href="https://stackoverflow.com/questions/1705/found-a-critical-bug-but-the-company-doesnt-care">another</a> with some useful answers if a company doesn't (seem to) respond.</p>