source: https://www.securityfocus.com/bid/41132/info
Cimy Counter for WordPress is prone to an HTTP response-splitting vulnerability and a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input.
An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user, steal cookie-based authentication credentials, and influence how web content is served, cached, or interpreted. This could aid in various attacks that try to entice client users into a false sense of trust.
Versions prior to Cimy Counter for WordPress 0.9.5 are vulnerable.
The following example URIs are available:
http://www.example.com/wp-content/plugins/cimy-counter/cc_redirect.php?cc=Downloads&fn=data:text/html;base64,PHNjcmlwdD5hbGVydChkb2N1bWVudC5jb29raWUpPC9zY3JpcHQ%2b
http://www.example.com/wp-content/plugins/cimy-counter/cc_redirect.php?cc=TestCounter&fn=%0AHeader:test