Thousands of etcd installations are leaking 750MB worth of passwords, keys, and sensitive data. Credentials for things like cms_admin, mysql_root, postgres could be used to hack into the systems. Thousands of servers belonging to private businesses and organizations are leaking credentials. Hackers could use the credentials to access the servers and steal sensitive data or use the machines to power cyber attacks. In order to keep etcd installs secure it is necessary to enable authentication and get them offline if not required.”]
Source: http://securityaffairs.co/wordpress/70611/hacking/etcd-installs-data-leak.html