CVE-2017-16906
In Horde Groupware 5.2.19-5.2.22, there is XSS via the URL field in a "Calendar -> New Event" action.
Date published : 2017-11-20
https://github.com/horde/kronolith/commit/09d90141292f9ec516a7a2007bf828ce2bbdf60d
http://code610.blogspot.com/2017/11/rce-via-xss-horde-5219.html