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Vulnerabilities

Vulnerability · CVE-2026-66441

WordPress MultiVendorX Plugin Broken Access Control

Published Aug 10, 2026 · catalog updated Aug 10, 2026 · MultiVendorX MultiVendorX

Patch now

CVE-2026-66441 is in the CISA known-exploited catalog. Confirm MultiVendorX MultiVendorX against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.39%
Remediation
Remediation guidance
Affected products
stated MultiVendorX · vendor MultiVendorX MultiVendorX

Unauthenticated Broken Access Control in MultiVendorX <= 5.0.10 versions.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated MultiVendorX<= 5.0.10
  • vendor MultiVendorX MultiVendorXversion unspecified

How to fix CVE-2026-66441

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-66441 is in the CISA known-exploited catalog. Confirm MultiVendorX MultiVendorX against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with MultiVendorX <= 5.0.10. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.39%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 10, 2026 · VulnCheck KEV

    Detected

    Unauthenticated Broken Access Control in MultiVendorX <= 5.0.10 versions.

  2. Aug 10, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-66441

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-66441

    30-day exploitation probability 0.4%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-66441

    Unauthenticated Broken Access Control in MultiVendorX <= 5.0.10 versions.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.