Backdoor in Copyfish (Chrome extension) - #VU7957

Vulnerability identifier: #VU7957

CSH Severity: Critical

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: N/A

CWE-ID: CWE-798

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

The vulnerability allows a remote attacker to gain unauthorized access to victim's browser.

The vulnerability exists due to presence of backdoor code in Copyfish Google Chrome extension 2.8.5, distributed via Google Web Store.

Copyfish (Chrome extension)

Update to version 2.8.6 or later.

• https://www.proofpoint.com/us/threat-insight/post/threat-actor-goes-chrome-extension-hijacking-spree

• Backdoor in Copyfish Google Chrome extension