ILIAS before 5.1.26, 5.2.x before 5.2.15, and 5.3.x before 5.3.4, due to inconsistencies in parameter handling, is vulnerable to various instances of reflected cross-site-scripting.
packetstormsecurity.com/files/147726/ILIAS-5.3.2-5.2.14-5.1.25-Cross-Site-Scripting.html
www.securityfocus.com/archive/1/542025/100/0/threaded
www.ilias.de/docu/ilias.php?ref_id=1719&from_page=116793&obj_id=116793&cmd=layout&cmdClass=illmpresentationgui&cmdNode=wc&baseClass=ilLMPresentationGUI
www.ilias.de/docu/ilias.php?ref_id=1719&from_page=116805&obj_id=116799&cmd=layout&cmdClass=illmpresentationgui&cmdNode=wc&baseClass=ilLMPresentationGUI
www.ilias.de/docu/ilias.php?ref_id=1719&obj_id=116792&from_page=116805&cmd=layout&cmdClass=illmpresentationgui&cmdNode=wc&baseClass=ilLMPresentationGUI
www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2018-007.txt