Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded-* headers to the origin server based on client side Connection header hop-by-hop mechanism. This may be used to bypass IP based authentication on the origin server/application.
{
"cpes": [
"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
],
"severity": "Critical"
}