PHP remote file inclusion vulnerability in php-inc/log.inc.php in sk.log 0.5.3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the SKIN_URL parameter.
https://www.exploit-db.com/exploits/4454
https://exchange.xforce.ibmcloud.com/vulnerabilities/36765
http://www.vupen.com/english/advisories/2007/3256
http://www.securityfocus.com/archive/1/480484/100/0/threaded
http://www.attrition.org/pipermail/vim/2007-September/001803.html