I seen this last night but didn't give it much notice. Apparently there was a bug in the CloudFlare platform that leaked sensitive information through a memory leak. Usernames, Passwords, and 2 Factor Authorization codes are at risk. This was similar to the Heartbleed bug that affected most Android devices awhile back. CloudFlare is a company that protects several cryptocurrency exchanges from DDoS attacks. (Denial of Service Attacks).
You can read the full story here at Coindesk: http://www.coindesk.com/cloudflare-bug-password-warnings-bitcoin-exchanges/
You can find a complete list of sites affected here: https://github.com/pirate/sites-using-cloudflare
It is strongly recommended that you change both your passwords and your 2FA on all sites affected by this bug.
