CVE-2023-4104 Missing authorization in Mozilla VPN 2.16.1

Q: Is CVE-2023-4104 being exploited?

There is no known exploitation of CVE-2023-4104 in the wild and no public exploit code.

Q: How do I fix CVE-2023-4104?

No fix has been published for CVE-2023-4104 yet. Limit exposure of the affected software until one is available.

Medium 5.5 Published 11 Sep 2023 Updated 3 Jul 2025

Local attackers can bypass authentication to configure arbitrary VPN setups on Linux, potentially altering network traffic or gaining elevated privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-4104?

CVE-2023-4104 is a medium-severity missing authorization vulnerability in Mozilla VPN 2.16.1, published on 11 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An invalid Polkit Authentication check and missing authentication requirements for D-Bus methods allowed any local user to configure arbitrary VPN setups. *This bug only affects Mozilla VPN on Linux. Other operating systems are unaffected.* This vulnerability affects Mozilla VPN 2.16.1 < (Linux).

Weakness: CWE-862

Which versions are affected by CVE-2023-4104?

It affects 1 product.

Products include Mozilla Vpn.

How do I fix CVE-2023-4104?

No fix has been published for CVE-2023-4104 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-4104 being exploited?

There is no known exploitation of CVE-2023-4104 in the wild and no public exploit code.

Sources

Also known as GHSA-f2fh-jcp2-h8mp, UBUNTU-CVE-2023-4104.