WordPress NewsLetter Plugin Cross Site Scripting Vulnerability

Summary
This host is running WordPress with NewsLetter plugin and is prone to cross site scripting vulnerability.
Impact
Successful exploitation will allow remote attackers to insert arbitrary HTML and script code, which will be executed in a user's browser session in the context of an affected site. Impact Level: Application
Solution
Upgrade to Wordpress Newsletter Plugin version 3.2.7 or later, For updates refer to http://wordpress.org/extend/plugins/newsletter
Insight
The input passed via 'alert' parameters to '/wp-content/plugins/newsletter/subscription/page.php' script is not properly sanitised before being returned to the user.
Affected
Wordpress Newsletter Plugin 3.2.6 and prior
References