A reflected Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server version 10.8.1 and below may allow a remote attacker able to convince a user to click on a crafted link which could potentially execute arbitrary JavaScript code in the user’s browser.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.