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)How long ago was this known?
I think it was since September last year there was a breach in their service but they didn't report it until just now.
I hate when those companies hide these things when they actually do happen because they are thinking they are somehow doing "Damage control" but actually making it much much worst for them not notifying the public of these customer information have been comprised type of scenarios.