source: http://www.securityfocus.com/bid/42967/info

Pligg CMS is prone to an SQL-injection vulnerability and a cross-site scripting vulnerability because it fails to sufficiently sanitize user-supplied data.

Exploiting these vulnerabilities could allow an attacker to steal cookie-based authentication credentials, compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database.

Pligg CMS 1.0.4 is vulnerable; other versions may also be affected. 

The following example URIs are available:

http://www.example.com//pliggcms_1_0_4/login.php?email=sql'injection&processlogin=3&return=%2fpliggcms_1_0_4%2f
http://www.example.com/pliggcms_1_0_4/user.php?category=%22%20onmouseover%3dprompt%28938687%29%20bad%3d%22&id=&keyword=Search..&login=&module=&page=&search=&view=search 