Why Hotmail could spread viruses even faster than Outlook

The Register reports on a flaw in the Web-based email services, such as Yahoo! and Hotmail, that makes them a good way to mass mail viruses. “That’s the serious warning contained in a posting to the BugTraq security mailing list
by a security researcher who said that cross-site scripting vulnerabilities make it
possible to replicate Melissa-type worms through Web mail services.”