CVE-2026-66589: Kings Plugins b2bking

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Kings Plugins b2bking: up to and including 5.2.30

Published 2026-08-18. Last modified 2026-08-21.