(Feb 25, 2016 09:26 AM)Armada Wrote: Use a vulnerability scanner... they are literally designed to do this for you.
Worst piece of advice ever. Most if not all vulnerability scanners are garbage. They leave thousands of requests to the server and logs everywhere. Any decent site is going to block your requests or become painfully aware that someone is scanning. Any shit site that you actually can scan because it's a piece of garbage isn't worth getting into the bad habit of scanning websites over.
OP, I'll just give you a simple tip.
Step 1: Go to Google
Step 2: type the following - site:yoursitename.com ext:php
If the site is running asp or aspx then change ext:php to ext:asp or whatever.
Now you'll be given an indexing of URL's from your site which contain php extension assuming they are running php (or whatever other filetype you specified).
Now you can check parameters and see if you can find anything.
Though, do note this is just one common trick and by far the simplest thing to do. There's more advanced methods but I gave you a quick easy solution.