Wordpress Spicy Blogroll Plugin File Inclusion Vulnerability

Summary
This host is running Wordpress Spicy Blogroll Plugin and prone to file inclusion vulnerability.
Impact
Successful exploitation will allow attacker to bypass certain security restrictions and gain access to file system and other configuration files. 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
Input passed via 'var2' and 'var4' parameters to '/spicy-blogroll/spicy-blogroll-ajax.php' script is not properly sanitised before being used in the code.
Affected
Wordpress Spicy Blogroll Plugin version 1.0.0 and prior
Detection
Send a scrambled file name via HTTP GET request and check whether it is able to read the system file or not.
References