PHP file inclusion vulnerability in index.php in PHP iCalendar 2.0a2 through 2.0.1 allows remote attackers to execute arbitrary PHP code and include arbitrary local files via the phpicalendar cookie. NOTE: this is not a cross-site scripting (XSS) issue as claimed by the original researcher.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22864
http://www.vupen.com/english/advisories/2005/2204
http://www.securityfocus.com/bid/15193
http://securitytracker.com/id?1015102
http://securityreason.com/securityalert/113