Google Voice Mails have been discovered in Google s search engine, providing audio files, names, and phone number as if you were logged in and checking your own voice mail. Some appear to be test messages, while others are clearly not. Google Voice team explains the situation in a new blog post from the Google Voice blog post explaining the situation. Google has made a change to prevent those voicemails from being crawled so only the site owner can decide to index them. There is an interesting discussion on this at Slashdot.
Source: https://threatpost.com/google-voice-mails-found-public-search-engine-102009/72351/