Adding this gadget to any wave will make people log out when they see it: http://beford.org/stuff/waveg.xml The code: <script type="text/javascript"> top.location="https://wave.google.com/wave/logout"; </script>
There is a recent discussion on ha.ckers.org regarding a possible CSRF that could allow an attacker to inject an evil gadget on someobdy else’s iGoogle page. After checking the format of the xml file used to define the gadgets properties, I noticed a couple of attributes that could be used as point of injections to active content, the thumbnail and screenshot attribute. Only one of them is vulnerable, the screenshot attribute, by using a javascript URI as value you can execute active content on certain browsers such as IE6. This is a poc that shows an alert with the current document.domain value: ...