See a list of to audit your site
For more advanced examples and protection methods, you can check out resources like the Google Hacking Database (GHDB) or modern security guides from CybelAngel and Box Piper . Document Grinding and Database Digging - ScienceDirect.com
filetype:xlsx site:gov password – Looks for Excel files containing passwords specifically on government websites.
Searching for filetype:xls username password on Google is – it is simply using a public search engine. However, what you do with the results determines legality:
If you discover that one of your Excel files is indexed by Google with the filetype:xls username password query: