Description
Unauthenticated Broken Access Control in MultiVendorX <= 5.0.14 versions.
Published: 2026-08-18
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability is an unauthenticated broken access control flaw that allows attackers to access or modify resources that should be restricted. Because the flaw does not require prior authentication, an attacker could retrieve sensitive vendor or order information, potentially leading to data disclosure or further exploitation of the site. The weakness is identified as an improper authorization issue, which can undermine the overall security posture of a multi‑vendor WordPress site.

Affected Systems

The flaw affects the MultiVendorX plugin for WordPress, versions 5.0.14 and earlier. Users running any of these versions are at risk until they upgrade to a fixed release.

Risk and Exploitability

With a CVSS score of 6.5 the vulnerability is moderate and could be exploited by unauthenticated users who submit crafted requests to the plugin’s endpoints. The EPSS score is not available, and the flaw is not listed in the CISA KEV catalog. Based on the description, the likely attack vector is a direct HTTP request to the plugin’s protected functions, which does not require authentication. While no public exploit is indicated, the nature of the flaw means that a determined attacker could leverage it to gain unauthorized access or modify data.

Generated by OpenCVE AI on August 18, 2026 at 17:07 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade to MultiVendorX 5.0.15 or later, which includes the access control fix
  • Review and tighten role permissions for the plugin, ensuring that only trusted user roles can access sensitive functions
  • Disable any unnecessary plugin features that expose administrative endpoints and validate that the updated version no longer permits unauthenticated access

Generated by OpenCVE AI on August 18, 2026 at 17:07 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 18 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Multivendorx
Multivendorx multivendorx
Wordpress
Wordpress wordpress
Vendors & Products Multivendorx
Multivendorx multivendorx
Wordpress
Wordpress wordpress

Tue, 18 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 18 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Description Unauthenticated Broken Access Control in MultiVendorX <= 5.0.14 versions.
Title WordPress MultiVendorX plugin <= 5.0.14 - Broken Access Control vulnerability
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}


Subscriptions

Multivendorx Multivendorx
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Patchstack

Published:

Updated: 2026-08-18T15:12:14.606Z

Reserved: 2026-07-27T14:00:38.499Z

Link: CVE-2026-66651

cve-icon Vulnrichment

Updated: 2026-08-18T15:01:06.154Z

cve-icon NVD

Status : Deferred

Published: 2026-08-18T15:16:59.560

Modified: 2026-08-20T12:49:04.990

Link: CVE-2026-66651

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T17:15:04Z

Weaknesses