CVE-2026-66589 WordPress B2BKing plugin <= 5.2.30 - Broken Access Control vulnerability
Attackers can bypass access controls in the B2BKing WordPress plugin to perform unauthorized actions or modify data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66589?
CVE-2026-66589 is a medium-severity missing authorization vulnerability in Kings Plugins B2BKing, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-66589?
How do I fix CVE-2026-66589?
No fix has been published for CVE-2026-66589 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-66589 being exploited?
There is no known exploitation of CVE-2026-66589 in the wild and no public exploit code.
Sources
Also known as GHSA-9cx2-qw86-5677.