Vulnerability Summary: Elasticsearch versions 1.3.x and prior have
a default configuration for CORS that allows an attacker to craft
links that could cause a user's browser to send requests to
Elasticsearch instances on their local network. These requests could
cause data loss or compromise.
Remediation Summary: Users should either set "http.cors.enabled" to
false, or set "http.cors.allow-origin" to the value of the server
that should be allowed access, such as localhost or a server hosting
Kibana. Disabling CORS entirely with the former setting is more
secure, but may not be suitable for all use cases.