PHP remote file inclusion vulnerability in calendar.php in SoftComplex PHP Event Calendar 1.4 allows remote attackers to execute arbitrary PHP code via a URL in the path_to_calendar parameter, which overwrites the $path_to_calendar variable from an extract function call.
https://exchange.xforce.ibmcloud.com/vulnerabilities/27766
http://www.vupen.com/english/advisories/2006/2848
http://www.solpotcrew.org/adv/solpot-adv-01.txt
http://www.securityfocus.com/archive/1/440265/100/0/threaded