Google Translation:

February 23, 2017, CloudFlare's official report on security issues caused by sensitive data leaked to HTML. Cloudflare said the risk of data leakage is 1 out of 3 300 000 (or 0.00003%) requirements.
For more information on this issue, see Cloudflare's official blog https://blog.cloudflare.com/incident...re-parser-bug/

This issue is mainly related to using pt.hdupt.com to access and use this site users
If you are using domain login or register pt.hdupt.com site then please change your password immediately
at present cloudflare says the problem has been fixed
in this domain is still available, please rest assured.
Pt.upxin.net and cn.z4a.net do not involve in the problem
Thank you!