CloudFlare just announced an issue (https://blog.cloudflare.com/incident-report-on-memory-leak-caused-by-cloudflare-parser-bug/). From the details they describe, it seems like it is unlikely that ipoMiner users will actually be affected, but it's certainly worth posting about.

The most likely potential window for information leaking at CloudFlare seems to be between February 13 and February 18, but it's possible the issue existed as far back as September 2016. I removed all session/login cached data as a precaution as of February 24 00:00 GMT, which just means you'll need to login to your account again the next time you visit the site regardless of when you last visited. It doesn't seem necessary to force every user to reset their ipoMiner password, but changing passwords is advisable if you want to be cautious.

Note that the CloudFlare issue impacts all sites using CloudFlare, which is a very large portion of the internet. Among many potentially significant sites, lots of cryptocurrency exchanges use CloudFlare, including Coinbase, Poloniex, and Bittrex. To be 100% certain of the security of your authentication data, you may want to update passwords on every site you use since it can be difficult to determine if a site uses CloudFlare or not.