On the 29.12.2017 security researcher reported a XSS vulnerability affecting the tmall.com.dnstree.com website via the Open Bug Bounty coordinated vulnerability disclosure program.
Vulnerability submitted via Open Bug Bounty| 29 December, 2017 12:11 GMT
Generic security notifications sent to website owner| 29 December, 2017 12:14 GMT
Notification sent to subscribers (without technical details)| 29 December, 2017 14:17 GMT
If you are the website owner or administrator please contact the researcher directly to get vulnerability details and proceed to coordinated disclosure.