Description
Graylog before v2.4.4 has an XSS security issue with unescaped text in notifications, related to toastr and util/UserNotification.js.
Remediation
References
https://github.com/Graylog2/graylog2-server/pull/4727
https://www.graylog.org/post/announcing-graylog-v2-4-4