An "index of" search targets web servers that have directory listing enabled. Instead of showing a webpage, these servers display a list of all files in a folder. When combined with "password.txt" and "Facebook," the searcher is typically looking for accidentally exposed text files containing login credentials.
Finding your information in an exposed password.txt file is a major security threat. If a file is indexed by Google, it is available to anyone, meaning your account could be compromised within minutes. Signs that your account might already be affected include:
Files where scammers store credentials harvested from fake login pages.
In the context of , this often relates to: