WordPress Spider Calendar Plugin Cross Site Scripting Vulnerability

Summary
This host is running WordPress Spider Calendar Plugin and is prone to cross site scripting vulnerability.
Impact
Successful exploitation could allow attackers to execute arbitrary HTML and script code in a user's browser session in the context of an affected site. Impact Level: Application
Solution
Update to version 1.1.3 or later, For updates refer to http://wordpress.org/extend/plugins/spider-calendar
Insight
Input passed via the 'date' parameter to 'front_end/spidercalendarbig.php' is not properly sanitised before being returned to the user.
Affected
WordPress Spider Calendar Plugin version 1.0.1
References