What is CVE-2026-66589?

CVE-2026-66589 is a medium-severity vulnerability in Kings Plugins B2bking, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-18.

How severe is CVE-2026-66589?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Kings Plugins B2bking

CVE-2026-66589

Missing Authorization vulnerability in Kings Plugins B2BKing allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects B2BKing: from n/a through 5.2.30.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Kings Plugins B2bking

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-66589?: CVE-2026-66589 is a medium-severity vulnerability in Kings Plugins B2bking, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-08-18.
How severe is CVE-2026-66589?: Medium severity. CVSS v3 base score is 5.4 out of 10.