A cross-site scripting vulnerability in the Query Console of Progress MarkLogic Server before 11.3.6 and 12.0.3 allows a remote attacker who lures an authenticated administrator to a crafted URL to execute arbitrary JavaScript in the administrator's browser session, capture credentials, and perform privileged actions on the administrator's behalf.
Restrict network access to the App-Services port (8000) to trusted networks. Configure a reverse proxy or web application firewall to reject malformed paths, including paths containing encoded path traversal sequences or multiple leading slashes. Users should avoid opening untrusted links while authenticated to Query Console.