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PatchSiren cyber security CVE debrief

CVE-2026-39591 CMSJunkie – WordPress Business Directory Plugins CVE debrief

A critical vulnerability (CVSS Score: 9.9) was discovered in the WP-BusinessDirectory plugin, version <= 4.0.0. This vulnerability allows subscribers to upload arbitrary files, potentially leading to severe consequences.

Vendor
CMSJunkie – WordPress Business Directory Plugins
Product
WP-BusinessDirectory
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Administrators and users of WordPress sites utilizing the WP-BusinessDirectory plugin version 4.0.0 or earlier should be aware of this vulnerability.

Technical summary

The WP-BusinessDirectory plugin, version <= 4.0.0, is vulnerable to arbitrary file uploads by subscribers. This issue has been assigned a CVSS score of 9.9, indicating a critical severity level.

Defensive priority

High

Recommended defensive actions

  • Update WP-BusinessDirectory plugin to a version greater than 4.0.0.
  • Review and restrict file upload permissions for subscribers.
  • Monitor your WordPress site for suspicious file uploads.

Evidence notes

Evidence suggests that this vulnerability exists in WP-BusinessDirectory plugin versions <= 4.0.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-39591 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-39591

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-39591 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-39591

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.