DataLife Engine (DLE) 9.7 allows remote attackers to execute arbitrary PHP code via the catlist[] parameter to engine/preview.php, which is used in a preg_replace function call with an e modifier.
http://www.securityfocus.com/bid/57603
http://secunia.com/advisories/51971
http://dleviet.com/dle/bug-fix/3281-security-patches-for-dle-97.html