Cloudflare had a memory leak, so if you went to any of the 5 million sites impacted between 09-22-2016 and 2-18-2017, your passwords, private messages, API keys, and other sensitive data may have been leaked. The list of affected sites is here:
https://github.com/pirate/sites-using-cloudflare
Erich Kron is the Security Awareness Advocate at KnowBe4, and has over 20 years’ experience in the medical, aerospace manufacturing and defense fields. He is the former security manager for the US Army 2nd Regional Cyber Center-Western Hemisphere.