A new vulnerability and Proof Of Concept (PoC) code has been posted to the Full Disclosure mailing list. Chris Evans says:
A nasty vulnerability exists in the latest Internet Explorer 8. I have been unsuccessful in persuading the vendor to issue a fix. The bug permits — for example — an arbitrary web site to force the victim to make tweets.
A harmless example has also been posted on his site (see below)
http://scary.beasts.org/misc/twitter.html
This bug appears to be strictly related to Internet Explorer and no fault of Twitter. At this time there does not appear to be a resonable workaround. This appears to be a Cross-origin CSS attack which uses the style sheet import to steal confidential information from a victim website, hijacking a user’s existing authenticated session.
Chris continues to state that there is evidence to suggest that Microsoft has been aware of this since at least 2008.










