There is an HTML injection vulnerability in Esri Portal for ArcGIS 11.0 and below that may allow a remote, unauthenticated attacker to craft a URL which, when clicked, could potentially generate a message that may entice an unsuspecting victim to visit an arbitrary website. This could simplify phishing attacks.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
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.