|CVSS SCORE||6.5, (AV:N/AC:L/Au:S/C:P/I:P/A:P)|
The specific flaw exists within file_picker.php. The upload path specified by the user is not constrained, so any logged-in user can upload files to any location in the system that is writable by the web service. An attacker can leverage this to execute code on the system in the context of the web server.
03/29/2016 - ZDI disclosed the vulnerability reports to ICS-CERT (with an expected 'due date' of 07/27/16).
Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the service to trusted machines. Only the clients and servers that have a legitimate procedural relationship with the service should be permitted to communicate with it. This could be accomplished in a number of ways, most notably with firewall rules/whitelisting. These features are available in the native Windows Firewall, as described in http://technet.microsoft.com/en-us/library/cc725770%28WS.10%29.aspx and numerous other Microsoft Knowledge Base articles.