PHP remote file include vulnerability in common.php in txtForum 1.0.4-dev and earlier allows remote attackers to include and execute arbitrary PHP code via a URL in the skin parameter to login.php, and possibly other parameters to other PHP scripts, related to include statements in common.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25131
http://www.securityfocus.com/bid/17061
http://www.securityfocus.com/archive/1/427188/100/0/threaded
http://www.seclab.tuwien.ac.at/advisories/TUVSA-0603-004.txt