On the 21.06.2017 security researcher reported a XSS vulnerability affecting the syntus.nl website via the Open Bug Bounty coordinated vulnerability disclosure program.
Vulnerability submitted via Open Bug Bounty| 21 June, 2017 20:27 GMT
Generic security notifications sent to website owner| 21 June, 2017 20:29 GMT
Notification sent to subscribers (without technical details)| 21 June, 2017 22:17 GMT
If you are the website owner or administrator please contact the researcher directly to get vulnerability details and proceed to coordinated disclosure.