CloudFlare, a private multi-billion-dollar company which secures websites by filtering out hacks, accidentally leaked customer information for months, the company has said.

Among the data spilled are "private messages from major dating sites, full messages from a well-known chat service, online password manager data, frames from adult video sites, and hotel bookings," said Alphabet's  (GOOGL) - Get Alphabet Inc. Class A Report Google security researcher Travis Ormandy, who first reported the leak last week.

The leak has impacted companies including Uber, 1Password, FitBit (FIT) - Get Fitbit, Inc. Class A Report and OKCupid, Ormandy noted.

Uber said the impact was very limited, and passwords were not exposed. OKCupid echoed a similar response, stating that the leak revealed minimal if any, exposure.

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FitBit is currently investigating the matter and is urging users to change their passwords.