There is a Cross‑Site Scripting (XSS) issue in Esri ArcGIS Pro versions 3.6.0 and earlier. ArcGIS Pro is a desktop application, and exploitation is limited to local users interacting with the application; no privileged role or elevated permissions are required beyond standard local user access. A local attacker can supply malicious strings that may be rendered and executed when a specific dialog within ArcGIS Pro is opened. This issue is fixed in ArcGIS Pro version 3.6.1.
https://www.esri.com/arcgis-blog/products/arcgis-pro/administration/arcgis-pro-3-6-1-patch