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
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-3365
http://www.vupen.com/english/advisories/2005/2204
http://www.ush.it/2005/10/25/php-icalendar-css/
http://www.securityfocus.com/bid/15193
http://securitytracker.com/id?1015102
http://securityreason.com/securityalert/113
http://secunia.com/advisories/17328/
http://marc.info/?l=bugtraq&m=113025930517426&w=2
http://archives.neohapsis.com/archives/fulldisclosure/2005-10/0512.html