Simon Willison’s Weblog

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1 item tagged “worms”

2009

17-year-old claims responsibility for Twitter worm. It was a text book XSS attack—the URL on the user profile wasn’t properly escaped, allowing an attacker to insert a script element linking out to externally hosted JavaScript which then used Ajax to steal any logged-in user’s anti-CSRF token and use it to self-replicate in to their profile.

# 12th April 2009, 7:22 pm / csrf, security, twitter, worms, xss