source: http://www.securityfocus.com/bid/50746/info

Lanoba Social Plugin for WordPress is prone to a cross-site-scripting vulnerability because it fails to properly sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.

Lanoba Social Plugin 1.0 is vulnerable; other versions may also be affected.

UPDATE (Nov 28, 2011): The vendor refutes this issue claiming they are not able to replicate the problem, and all inputs are sanitized. This BID will be updated, and possibly retired pending further information. 

http://www.example.com/[path]/wp-content/plugins/lanoba-social-plugin/index.php?action=[xss]