Wordpress Sexy Squeeze Pages 'id' Parameter XSS Vulnerability

Summary
This host is installed with Wordpress Sexy Squeeze Pages and is prone to cross site scripting vulnerability.
Impact
Successful exploitation will allow remote attackers to execute arbitrary HTML and script code in a users browser session in the context of an affected site. Impact Level: Application
Solution
No solution or patch is available as of 20th February, 2015. Information regarding this issue will be updated once the solution details are available. For updates refer to http://instasqueeze.com
Insight
Flaw is due to the /instasqueeze/lp/index.php script does not validate input to the 'id' parameter before returning it to users.
Affected
Wordpress InstaSqueeze Sexy Squeeze Pages Plugin
Detection
Send a crafted data via HTTP GET request and check whether it is able to read cookie or not.
References