CVE-2026-66589Network attack vector

Subscriber access to privileged functions

Published Aug 18, 2026 · Updated Aug 18, 2026

Broken access control in the B2BKing plugin for WordPress through 5.2.30 lets remote authenticated users reach privileged B2B functions. Patchstack states that subscriber-level access is sufficient but does not disclose the specific endpoint, function, or missing authorization check, so the exact code path and unauthorized action are not public. Exposure is limited to sites that permit subscriber or equivalent low-privilege accounts, and the published CVSS confines the reported impact to limited confidentiality and integrity effects.

CVSS severity5.4
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken access control in the B2BKing plugin for WordPress through 5.2.30 lets remote authenticated users reach privileged B2B functions. Patchstack states that subscriber-level access is sufficient but does not disclose the specific endpoint, function, or missing authorization check, so the exact code path and unauthorized action are not public. Exposure is limited to sites that permit subscriber or equivalent low-privilege accounts, and the published CVSS confines the reported impact to limited confidentiality and integrity effects.

The record

CVE
CVE-2026-66589
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
KingsPlugins
Product
B2BKing
Classifications
CWE-862, CAPEC-180, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=5.2.30 changes=[{"at":"5.2.40","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KingsPlugins · B2BKingversion=n/a <=5.2.30 changes=[{"at":"5.2.40","status":"unaffected"}]

Published CVSS scores

5.4PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo