Does your printer print without you doing anything? Now research shows how cross-site scripting techniques can be used to send spam messages to the printer.

Hijacking Printers For Spamming (at informationweek.com)

Great, soon we can't turn the trees into paper fast enough ... Well, maybe at least better than that all print jobs get copied to another server as also mentioned in the article, but that's an old hack. Better secure those printers.

(It would be more comfortable if not every researcher, as it seems, published all security related proof of concepts.)