The alterSearchQuery function in lib/controllers/CmdownloadController.php in the CreativeMinds CM Downloads Manager plugin before 2.0.4 for WordPress allows remote attackers to execute arbitrary PHP code via the CMDsearch parameter to cmdownloads/, which is processed by the PHP create_function function.
https://downloadsmanager.cminds.com/release-notes/
http://www.securityfocus.com/bid/71204
http://www.securityfocus.com/archive/1/534037/100/0/threaded
http://www.itas.vn/news/code-injection-in-cm-download-manager-plugin-66.html