With X-Pack installed, Kibana versions before 5.3.1 have an open redirect vulnerability on the login page that would enable an attacker to craft a link that redirects to an arbitrary website.
[
{
"product": "Elastic X-Pack Security",
"vendor": "Elastic",
"versions": [
{
"status": "affected",
"version": "before 5.3.1"
}
]
}
]