Is CyberGhost VPN Free Proxy safe?

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.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.