dadaIMC .99.3 uses an insufficiently restrictive FilesMatch directive in the installed .htaccess file, which allows remote attackers to execute arbitrary PHP code by uploading files whose names contain (1) feature, (2) editor, (3) newswire, (4) otherpress, (5) admin, (6) pbook, (7) media, or (8) mod, which are processed as PHP file types (application/x-httpd-php).