Incomplete blacklist vulnerability in javaUpload.php in Postlet in the FileManager module in CMS Made Simple 1.2.4 and earlier allows remote attackers to execute arbitrary code by uploading a file with a name ending in (1) .jsp (2) .php3 (3) .cgi (4) .dhtml (5) .phtml (6) .php5 or (7) .jar then accessing it via a direct request to the file in modules/FileManager/postlet/.