Raven has released an immidiate security fix for Ravens Nuke, Im presuming that this is for Ravens v2.30 but just to be on the safe side please download and add this fix now !

Taken from Ravens Site

Unfortunately, there is a major security hole that has been found and released to the public.

I have made available the fixed file for download at PATCHED FILE FIX .

After you download it you need to unzip it and use the unzipped downloaded file to replace the same named file, captcha.php in YOUR_RN_ROOT_FOLDER/images/captcha.php.

You must do this immediately as the vulnerability is a destructive exploit. You will lose data if you do not patch this hole.