Multiple PHP remote file inclusion vulnerabilities in Post Revolution 6.6 and 7.0 RC2 allow remote attackers to execute arbitrary PHP code via a URL in the dir parameter to (1) common.php or (2) themes/default/preview_post_completo.php.
https://www.exploit-db.com/exploits/3785
https://exchange.xforce.ibmcloud.com/vulnerabilities/33825
http://www.vupen.com/english/advisories/2007/1513
http://www.securityfocus.com/bid/23607
http://www.securityfocus.com/archive/1/466707/100/0/threaded
http://securityreason.com/securityalert/2653