CVE-2026-66441

MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions <= 5.0.10 - Missing Authorization

2026-08-07 00:00

Strategic Overview

Status: Patched in 5.0.11
Affected Plugin: MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions
Affected Version: <= 5.0.10
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2026-66441

View all MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions vulnerabilities

At a glance

CVE-2026-66441 is a medium-severity Missing Authorization vulnerability in the MultiVendorX WordPress plugin, affecting versions <= 5.0.10. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.0.11; sites on affected versions should update now. Disclosed August 2026, reported by Uma Mo.

Vulnerability Overview

The MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on a function in versions up to, and including, 5.0.10. This makes it possible for unauthenticated attackers to perform an unauthorized action.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in MultiVendorX <= 5.0.10 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For MultiVendorX the fix is 5.0.11: builds <= 5.0.10 are affected, anything from 5.0.11 onward is not.

Remediation

Update to version 5.0.11, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: MultiVendorX 5.0.11 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-66441 https://www.wordfence.com/threat-intel/vulnerabilities/id/40588454-66f3-4c84-98b4-11b81e019908 https://nvd.nist.gov/vuln/detail/CVE-2026-66441

Related records

Same weakness class

Other vulnerabilities in MultiVendorX – WooCommerce Multivendor Marketplace AI Powered Solutions

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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