Textpattern 'index.php' Cross Site Scripting Vulnerability

Summary
This host is installed with Textpattern and is prone to cross site scripting vulnerability.
Impact
Successful exploitation will allow attacker to execute arbitrary HTML and script code in a user's browser session in the context of an affected site. Impact Level: Application
Solution
Upgrade Textpattern 4.5.7 or later, For updates refer to http://textpattern.com
Insight
The flaw exists due to insufficient sanitization of input data passed via URI after '/textpattern/setup/index.php' script.
Affected
Textpattern version 4.5.5 and probably prior
Detection
Send a crafted request via HTTP GET and check whether it is able to read cookie or not.
References