UploadFile.php in MoniWiki 1.0.9.2 and earlier, when used with Apache mod_mime, does not properly handle files with two file extensions, such as .php.hwp, which allows remote attackers to upload and execute arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18493
http://www.securityfocus.com/bid/11951
http://secunia.com/advisories/13478
http://marc.info/?l=bugtraq&m=110314544711884&w=2
http://archives.neohapsis.com/archives/fulldisclosure/2004-12/0448.html