There is a Cross-site Scripting vulnerability in Portal for ArcGIS in versions 11.2 and below that may allow a remote, authenticated attacker to provide input that is not sanitized properly and is rendered in error messages. The are no privileges required to execute this attack.
There is an HTML injection vulnerability in Esri Portal for ArcGIS versions 11.1 and below that may allow a remote, unauthenticated attacker to create a crafted link which when clicked could render arbitrary HTML in the victim’s browser.
There is a cross-site-request forgery vulnerability in Esri Portal for ArcGIS Versions 11.1 and below that may in some cases allow a remote, unauthenticated attacker to trick an authorized user into executing unwanted actions via a crafted form. The impact to Confidentiality and Integrity vectors is limited and of low severity.
There is a stored Cross-site Scripting vulnerability in Esri Portal for ArcGIS Sites versions 11.1 and below that may allow a remote, authenticated attacker to create a crafted link that is stored in the site configuration which when clicked could potentially execute arbitrary JavaScript code in the victims browser. The privileges required to execute this attack are high. The impact to Confidentiality, Integrity and Availability are High.