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B2BKing CVE-2026-66589

| EUVDEUVD-2026-62211 MEDIUM
Missing Authorization (CWE-862)
2026-08-18 audit@patchstack.com GHSA-9cx2-qw86-5677
WordPress Authentication Bypass Wordpress Plugin
5.4
CVSS 3.1 · Vendor: patchstack
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Severity by source

Vendor (patchstack) PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
vuln.today AI
5.4 MEDIUM

Network-reachable by any authenticated low-privilege account (PR:L); low complexity; partial confidentiality and integrity impact on B2B data; no availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (patchstack).

CVSS VectorVendor: patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
Aug 19, 2026 - 05:08 vuln.today

DescriptionCVE.org

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.

AnalysisAI

Missing authorization in the B2BKing WordPress/WooCommerce plugin (versions through 5.2.30) allows authenticated low-privilege users to exploit incorrectly configured access control security levels, potentially accessing B2B wholesale pricing tiers, customer group data, or restricted functionality reserved for higher-privilege roles. Reported by Patchstack's audit team under ENISA EUVD-2026-62211, this broken access control flaw (CWE-862) carries a CVSS 5.4 Medium score. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid, authenticated WordPress account with at minimum subscriber or customer-level privileges on a site running B2BKing version 5.2.30 or earlier. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 5.4 Medium score reflects a network-exploitable, low-complexity flaw requiring only a low-privilege account - a registered customer or wholesale applicant on the target WooCommerce store. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Update the B2BKing plugin to a version beyond 5.2.30; the exact patched release version is not confirmed in the available intelligence - verify the current release on the WordPress plugin repository or the Kings Plugins changelog before upgrading. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-66589 vulnerability details – vuln.today
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