There is a Server-Side Request Forgery (SSRF) vulnerability in Esri ArcGIS Server Manager version 10.8.1 and below.
A Server-Side Request Forgery (SSRF) vulnerability in ArcGIS Server Manager version 10.8.1 and below may allow a remote, unauthenticated attacker to forge GET requests to arbitrary URLs from the system, potentially leading to network enumeration or facilitating other attacks.