Copyediting app Grammarly includeda gaping security holethat leave behind drug user of its internet browser extension open to more embarrassment than just misspelled quarrel .

The Grammarly internet browser university extension for Chrome and Firefox bear a “ in high spirits severity microbe ” that was leak authentication tokens , according to abug reportby Tavis Ormandy , a security measure researcher with Google ’s Project Zero . This meant that any website a Grammarly user visited could get at the user ’s “ papers , story , logs , and all other data , ” accord to Ormandy .

Grammarly has approximately 22 million users , according to Ormandy , and the company told Gizmodo in an email that it “ has no evidence that any user selective information was compromised ” by the security hole . “ We ’re continuing to monitor actively for any unusual bodily function , ” a Grammarly spokesperson said .

Argentina’s President Javier Milei (left) and Robert F. Kennedy Jr., holding a chainsaw in a photo posted to Kennedy’s X account on May 27. 2025.

The good news is , Grammarly quickly define the bug in the Chrome Web Store in what Ormandy call a “ really impressive reply clock time . ” Ormandy says Mozilla confirm the Firefox version of the prolongation also rolled out to users , and the updates should have been robotic .

“ The bug is fixed , and there is no action required by Grammarly drug user , ” the company spokesperson suppose .

Still , although the Grammarly bug was limited in its scope , let this be a reminder that break any internet browser plugin the power to get at literally everything you type online could leave you totally fcuked .

William Duplessie

Update , 10:08pm : A Grammarly spokesperson say Gizmodo in an email that it has no grounds of users being compromise by the vulnerability .

We ’ve updated this piece with the young selective information .

[ Cyberscoop ]

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