Twitter Inc has recommended that more than 330 million users change their passwords after a bug caused some passwords to be stored in plain text on its internal computer system, rather than being scrambled into a mix of numbers and letters.
While Twitter says that it is now fixed and an internal investigation found no signs of passwords being stolen or misused, it still urged users to change passwords "out of an abundance of caution."
"Due to a bug, passwords were written to an internal log before completing the hashing process," Twitter explained in a blog post. "We found this error ourselves, removed the passwords, and are implementing plans to prevent this bug from happening again."
Shares of the social media company dipped slightly after the glitch was announced.