Yeah basically until this is patched, don't join any un-trusted servers. Or any servers that pop up after this was announced.
Servers without strict mod restrictions are also at risk. So the servers that allow any mods are very risky, as the client can tell the server to do almost anything through mods/scripts. Although its limited to what they can do, there are still some malicious things they can pull off.
Do I care if you hate me? Do you wanna know the truth?
C'est la vie, adios, good riddance, f*** you.