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Fencer Vulns
medium 5.1

CVE-2025-67603 json

Lack of client authorization allows arbitrary users to influence the firewall configuration

published 2026-01-08 10 mo ago modified 2026-10-11 28 d ago also EUVD-2026-1562

cvss
5.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

A Improper Authorization vulnerability in Foomuuri llows arbitrary users to influence the firewall configuration.This issue affects Foomuuri: from ? before 0.31.

Patch / fix

  • https://github.com/FoobarOy/ Foomuuri 0.31
  • foomuuri Debian 13 0.27-2+deb13u1
  • foomuuri Debian 14 0.31-1

debian advisories DEBIAN-CVE-2025-67603

  • foomuuri Ubuntu 25.10 0.27-2+deb13u1build0.25.10.1
  • foomuuri Ubuntu Pro 24.04 LTS 0.22-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2025-67603

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-67603 updated cvss 7.3

Foomuuri: Foomuuri: Unauthorized firewall configuration changes due to improper authorization

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CNA 4.0 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • https://github.com/FoobarOy/ Foomuuri

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.