CVE-2025-67603 Lack of client authorization allows arbitrary users to influence the firewall configuration
Arbitrary users can modify firewall settings due to missing client authorization in Foomuuri, potentially bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-67603?
CVE-2025-67603 is a medium-severity missing authorization vulnerability in https://github.com/FoobarOy/ Foomuuri, published on 8 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Improper Authorization vulnerability in Foomuuri llows arbitrary users to influence the firewall configuration.This issue affects Foomuuri: from ? before 0.31.
Weakness: CWE-285
Which versions are affected by CVE-2025-67603?
How do I fix CVE-2025-67603?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-67603 being exploited?
There is no known exploitation of CVE-2025-67603 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-67603, GHSA-r6jh-234r-fv5v, UBUNTU-CVE-2025-67603.