A Stored Cross-site Scripting (XSS) vulnerability in the "Import of organizational units and title of organizational unit" feature in ILIAS 7.20 to 7.29 and ILIAS 8.4 to 8.10 as well as ILIAS 9.0 allows remote authenticated attackers with administrative privileges to inject arbitrary web script or HTML via XML file upload.
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.