Grammarly, a copyediting app/extension for Chrome and Firefox that points out typos and grammatical mistakes, had a major bug that allowed any website you visit to log into your account and read everything you ever wrote. It made all your documents, history, logs, tweets and blog posts vulnerable to high-tech snoops. Google’s Project Zero, which unearths and tracks vulnerabilities and reports them to software-makers, revealed the bug on February 2nd. Thankfully, the Grammarly team has quickly patched it up and has already auto-updated the program used by over 20 million users.