PhotoFollowing the discovery of a “critical” vulnerability affecting Firefox browsers, Mozilla is urging users to update their browser to version 67.0.3 right away. The flaw is currently being actively exploited by hackers, the company said.  

"A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop," the company wrote in a security advisory. "This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw."

In an alert of its own, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) urged users to update Firefox to prevent attackers from exploiting the vulnerability to take control of a system with the bug.

To update to Firefox 67.0.3, users can either:

  • Restart the browser; or

  • Download it on the company’s website.

To verify that a browser is up to date, go to "Firefox" on the menu bar and then tap "About Firefox."

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