Misconfigured HA Proxy can cause many private data to be leaked by attackers.
HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. The HAProxy Stats page provides a near real-time feed of data about the state of your proxied services. The HAProxy Stats page gives you a near real-time feed of information that you can use to troubleshoot proxied services, get insights about your traffic, and watch the load placed upon your servers.
If you have a HA Proxy Statistics Page that doesn't have any authentication mechanism, set an authentication mechanism immediately.