Social media giant discovered bug in an internal system that inadvertently stored passwords in plain text.

Happy World Password Day: Twitter today alerted its 330 million users to change their passwords after it detected a flaw in one of its internal logs that stored their passwords “unmasked.”

Twitter since has fixed the bug and said it has no knowledge of a breach or abuse of the information but is asking users to create new passwords just in case. The company protects passwords via the bcrypt hashing function, which basically replaces the password with a mix of random letters and numbers that are then stored in Twitter’s servers.

“Due to a bug, passwords were written to an internal log before completing the hashing process. We found this error ourselves, removed the passwords, and are implementing plans to prevent this bug from happening again,” Twitter said in a blog post about the exposed passwords.

“Out of an abundance of caution, we ask that you consider changing your password on all services where you’ve used this password,” the company said.

 

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