An open redirect flaw was found in Kibana versions before 7.13.0 and 6.8.16. If a logged in user visits a maliciously crafted URL, it could result in Kibana redirecting the user to an arbitrary website.
https://www.elastic.co/community/security/
https://discuss.elastic.co/t/elastic-stack-7-13-0-and-6-8-16-security-update/273964