What is CVE-2026-66676?

CVE-2026-66676 is a medium-severity vulnerability in Matrixaddons Easy Invoice, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-17.

How severe is CVE-2026-66676?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Matrixaddons Easy Invoice

CVE-2026-66676

Unauthenticated Broken Access Control in Easy Invoice <= 2.3.8 versions.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Matrixaddons Easy Invoice

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66676?: CVE-2026-66676 is a medium-severity vulnerability in Matrixaddons Easy Invoice, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-09-17.
How severe is CVE-2026-66676?: Medium severity. CVSS v3 base score is 5.3 out of 10.