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Twitter advises users change passwords

Man uses Twitter app.
Photo: Diptendu Dutta / AFP/ via Getty Images

Twitter advised that all users change their passwords Thursday after the social media site discovered it had stored them in a log in plain text rather than encrypted form.

According to a blog post from the company, there is no evidence that passwords were misused or stolen, and the advisory is out of caution. The announcement, at roughly 4 p.m. Eastern time, came just as the market closed. Twitter stock immediately dropped 2.5% in after hours trading, then recovered most of the loss.