Some of the most popular Bitcoin services on the internet may have leaked sensitive user information, including passwords.

Cloudflare is a popular content delivery network that effectively acts as a sort of digital shield, a proxy that offers millions of websites DoS protection and other services. Some of the biggest websites on the internet use Cloudflare, including several well-known Bitcoin companies, like Coinbase, Kraken, LocalBitcoins, Poloniex and more

Using a Bitcoin Service? You May Need to Change Your Password (Now)