Browser extensions are under attack from hackers who are adding malicious code to them in order to steal cookies and credentials from Chrome users.

Other extensions possibly affected include Internxt VPN, VPNCity, Uvoice, and ParrotTalks, as Bleeping Computer writes. Cyberhaven says hackers pushed an update (version 24.10.4) of its Cyberhaven data loss prevention extension containing the malicious code on Christmas Eve at 8:32PM ET.

Cyberhaven has confirmed its Google Chrome extension was the subject of a Christmas Eve cyberattack, exposing sensitive customer data like passwords and session tokens. In a statement, the data loss prevention company noted the attack showed signs of being part of a “wider campaign” to target other companies, too.

Multiple Chrome browser extensions have been hacked, allowing attackers to steal the data they handle, security experts have warned. Subverted extensions include a

Cyberhaven and other Chrome extensions were compromised in a supply chain attack targeting Facebook advertising users.

The data-loss startup says it was targeted as part of a "wider campaign to target Chrome extension developers."

A significant breach of popular Google Chrome extensions, including Cyberhaven, has exposed sensitive user data. Learn how the attack unfolded and how to secure your browser.

The attack began after a hacker successfully targeted a Cyberhaven employee via a phishing email that was sent to Chrome extension developers. The employee, believing the email was an official Google contact, clicked the email and input their login credentials on the phishing page.

The publishers of browser extensions on the Google Chrome Web Store were reportedly targeted via a phishing campaign.

Hackers were reportedly able to modify several Chrome extensions with malicious code this month after gaining access to admin accounts through a phishing campaign. The cybersecurity company Cyberhaven shared in a blog post this weekend that its Chrome extension was compromised on December 24 in an attack that appeared to be “targeting logins to specific social media advertising and AI platforms.

A hacker phished a Cyberhaven employee to upload a malicious version of the company's Chrome extension, but it may not be the only victim.