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Massive worm hits Tumblr, spams big blogs like USA Today

JB

A massive bug swept Tumblr today and infected some of the biggest blogs -- including USA Today, Reuters, The Verge, and CNET -- until Tumblr resolved the issue shortly before 10:30 a.m. PT.

GNAA, a hacker group, claimed responsibility for the attack. The group's Twitter profile earlier today said 8,600 unique Tumblr users were affected.

Tumblr didn't explain what happened but said in a blog post that no accounts were compromised, and users didn't need to take any further action.