Directory traversal vulnerability in data/showcode.php in ActiveCalendar 1.2.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the page parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/32691
http://www.vupen.com/english/advisories/2007/0759
http://www.securityfocus.com/bid/22704
http://www.securityfocus.com/archive/1/461313/100/0/threaded
http://www.securityfocus.com/archive/1/461146/100/0/threaded