PHP remote file inclusion vulnerability in plugins/widgets/htmledit/htmledit.php in Powl 0.94 allows remote attackers to execute arbitrary PHP code via a URL in the _POWL[installPath] parameter.
https://www.exploit-db.com/exploits/4090
https://exchange.xforce.ibmcloud.com/vulnerabilities/35005
http://www.vupen.com/english/advisories/2007/2306