Fetching this Google search URL provides a listing of random Uber trips that were somehow indexed by the search giant’s spider: www.google.com/?q=site:trip.uber.com:
Credit for this discovery goes to Mikko Hypponen of security firm F-Secure.
Searching for stuff on https://t.co/HXxwZnnWAW gets you information like this. pic.twitter.com/lfQlbN806W
— Mikko Hypponen (@mikko) September 2, 2015
Update (4:54pm PDT)
Uber appears to have fixed the problem by amending robots.txt to explicitly deny all indexing of trip.uber.com.