Multiple cross-site scripting (XSS) vulnerabilities in index.php in PHP-Calendar before 2.0 Beta7 allow remote attackers to inject arbitrary web script or HTML via the (1) description and (2) lastaction parameters.
packetstormsecurity.org/1005-advisories/phpcalendar-xss.txt
secunia.com/advisories/33899
www.securityfocus.com/archive/1/511395/100/0/threaded
www.securityfocus.com/bid/40334
www.vupen.com/english/advisories/2010/1202
exchange.xforce.ibmcloud.com/vulnerabilities/58861
php-calendar.blogspot.com/2010/05/php-calendar-20-beta7.html