Twilight CMS DeWeS Web Server Directory Traversal Vulnerability

Summary
The host is running Twilight CMS with DeWeS Web Server and is prone to directory traversal vulnerability.
Impact
Successful exploitation will allow attackers to read arbitrary files on the target system. 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 an improper sanitation of encoded user input via HTTP requests using directory traversal attack (e.g., /..%5c..%5c).
Affected
Twilight CMS DeWeS web server version 0.4.2 and prior.
Detection
Send the crafted HTTP GET request and check the is it possible to read the system file.
References