Is CyberGhost VPN Free Proxy safe?

Clean risk

CyberGhost VPN Free Proxy bundles a hardcoded shared API key that is sent to its backend on every request.

The extension includes a static API key in its bundled config file, which is injected as the 'x-app-key' header on all HTTP requests to apiv2.zenguard.biz. This key is identical across all installations and cannot be rotated without a new extension release. All users share the same credential when communicating with the VPN backend.

CyberGhostVPNv9.2.2Firefox Add-ons
3Risk
Who publishes it

CyberGhostVPN - no other listings under this identity, 9 shared hostnames

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
CyberGhostVPN
Website
www.cyberghostvpn.com

Shared hosts - 9 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

account.zenmate.com
Also called by 2 other listings, including ZenMate Free VPN
api.zenguard.biz
Also called by 2 other listings, including ZenMate Free VPN
apiv2.zenguard.biz
Also called by 2 other listings, including ZenMate Free VPN
feedback.zenmate.com
Also called by 2 other listings
zenguard.zendesk.com
Also called by 2 other listings, including ZenMate Free VPN
airport.us
Also called by 3 other listings, including Private Internet Access
thinkdifferent.us
Also called by 3 other listings, including Private Internet Access
zenmate.com
Also called by 4 other listings, including Zenmate Gratis VPN Chrome, Freezen MateVPN for Chrome
cyberghostvpn.com
Also called by 5 other listings, including Realtime VPN Per-Tab Speed & IP Flag, CyberGhost

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 9.2.2. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    *://*/*

  • See the address and title of every tab you have open

    tabs

  • Watch every request your browser makes

    webRequest

  • Change your browser's privacy and security settings

    privacy

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

  • Route all of your browsing through a server of its choosing

    proxy

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • Store data in your browser

    storage

  • Show you desktop notifications

    notifications

  • Read and change cookies, including the ones that keep you signed in

    cookies

  • Schedule its own background tasks

    alarms

  • Clear your browsing history, cache and cookies

    browsingData

  • See every page you navigate to, as you navigate to it

    webNavigation

Where it sends data

Destinations our analysis observed CyberGhost VPN Free Proxy contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • apiv2.zenguard.biz

    CyberGhost VPN Free Proxy sends data to apiv2.zenguard.biz. One other extension we have analyzed sends data here.

  • api.zenguard.biz

    CyberGhost VPN Free Proxy sends data to api.zenguard.biz. No other extension we have analyzed sends data here.

Updated 2 November 2026amo-925408