PineApp Mail-SeCure Absolute Path Traversal Vulnerability

Summary
This host is running PineApp Mail-SeCure appliance and is prone to absolute path traversal vulnerability.
Impact
Successful exploitation will allow remote attackers to perform directory traversal attacks and read arbitrary files on the affected appliance. Impact Level: Application
Solution
No solution or patch was made available for at least one year since disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.
Insight
The flaw is due to the '/admin/viewmsg.php' script not properly sanitizing user supplied input.
Affected
PineApp Mail-SeCure 5099SK version 3.70, Other versions may also be affected.
Detection
Send the crafted HTTP GET request and check is it possible to read the system file or not.
References