index.php in Horde Application Framework before 3.1.2 allows remote attackers to include web pages from other sites, which could be useful for phishing attacks, via a URL in the url parameter, aka "cross-site referencing." NOTE: some sources have referred to this issue as XSS, but it is different than classic XSS.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28411
http://www.vupen.com/english/advisories/2006/3309
http://www.securityfocus.com/archive/1/443360/100/0/threaded
http://www.scip.ch/cgi-bin/smss/showadvf.pl?id=2456
http://www.debian.org/security/2007/dsa-1406
http://securitytracker.com/id?1016713
http://securityreason.com/securityalert/1422
http://secunia.com/advisories/27565