A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server Services Directory version 10.8.1 and below may allow a remote authenticated attacker to pass and store malicious strings in the ArcGIS Services Directory.Referenceshttps://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/arcgis-server-security-2021-update-1-patch/