Cross-site scripting (XSS) vulnerability in admin/usermanager in IPplan 4.91a allows remote attackers to inject arbitrary web script or HTML via the grp parameter.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-1727
http://www.securityfocus.com/bid/35037
http://www.debian.org/security/2009/dsa-1827
http://secunia.com/advisories/35714