WordPress MultiVendorX plugin <= 5.0.18 - Broken Access Control vulnerability (CVE-2026-66651) | HOL Guard CVE

Medium · CVSS 6.5CVE-2026-66651

WordPress MultiVendorX plugin <= 5.0.18 - Broken Access Control vulnerability

Answer in brief

CVE-2026-66651 records a Medium severity (CVSS 6.5) vulnerability in WordPress MultiVendorX plugin <= 5.0.18 - Broken Access Control vulnerability. The current sources do not mark it as known exploited. The current feed maps MultiVendorX/dc-woocommerce-multi-vendor (generic), MultiVendorX/MultiVendorX (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 18, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Aug 18, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps MultiVendorX/dc-woocommerce-multi-vendor (generic), MultiVendorX/MultiVendorX (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
MultiVendorX/dc-woocommerce-multi-vendorgeneric	>=0 <=5.0.18	Not reported
MultiVendorX/MultiVendorXgeneric	n/a	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for MultiVendorX/dc-woocommerce-multi-vendor, MultiVendorX/MultiVendorX.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 18, 2026

Sources and claim methodology

Source referencepatchstack.com

Upstream source description

Missing Authorization vulnerability in MultiVendorX MultiVendorX dc-woocommerce-multi-vendor allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MultiVendorX: from n/a through 5.0.18.

Quoted source text, attributed separately from HOL analysis.