Cross-site scripting (XSS) vulnerability in rss/index.php in PHP iCalendar 2.22 and earlier allows remote attackers to inject arbitrary web script or HTML via the cal parameter.
kurdishsecurity.blogspot.com/2006/06/kurdish-security-12-php-icalendar.html
secunia.com/advisories/20883
securityreason.com/securityalert/1175
securitytracker.com/id?1016402
www.securityfocus.com/archive/1/438621/100/0/threaded
www.vupen.com/english/advisories/2006/2597
exchange.xforce.ibmcloud.com/vulnerabilities/27448