There is a cross-site-request forgery vulnerability in Esri Portal for ArcGIS Versions 11.0 and below that may allow an attacker to trick an authorized user into executing unwanted actions. 

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-25832
• https://support.esri.com/en-us/patches-updates/2023/portal-for-arcgis-security-2023-update-1-patch-8095
• https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/portal-for-arcgis-security-2023-update-1-patch-is-now-available/