Description
WordPress Plugin LiveSig is prone to a remote file include vulnerability because it fails to sufficiently sanitize user-supplied input. Exploiting this issue could allow an attacker to compromise the application and the underlying system; other attacks are also possible. WordPress Plugin LiveSig version 0.4 is vulnerable; other versions may also be affected.
Remediation
Edit the source code to ensure that input is properly sanitised or disable the plugin until a fix is available
References
http://www.exploit-db.com/exploits/17864/
http://packetstormsecurity.com/files/view/105223/wplivesig-rfi.txt
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