The Twitter website was yesterday widely exploited by users who have stumbled across a flaw which allows messages to pop-up and third-party websites to open in your browser just by moving your mouse over a link.
In a worrying development, messages was also spreading virally exploiting the cross-site-scripting (XSS) vulnerability without the consent of users.
Thousands of Twitter accounts have posted messages exploiting the flaw. Victims include Sarah Brown, wife of the former British Prime Minister.
According to Twitter Status the XSS security issue is now identified and patched.