Read the docs
TI-2023-28142 Aliases CVE-2023-51490GHSA-gh6x-qpj6-x25r

WordPress Defender Security Plugin <= 4.1.0 is vulnerable to Sensitive Data Exposure

Priority LOW 39CWE-532Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-532.

Summary

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in WPMU DEV Defender Security – Malware Scanner, Login Security & Firewall.This issue affects Defender Security – Malware Scanner, Login Security & Firewall: from n/a through 4.1.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0048 41st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wpmudevDefender Security – Malware Scanner, Login Security & Firewallup to 4.1.0—No fix listedCNA
  • Defender Security – Malware Scanner, Login Security & Firewall Vendorwpmudev Affected up to 4.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wpmudev:defender_security:*:*:*:*:*:wordpress:*:*up to 4.1.0Vulnerablewpmudev
  • cpe:2.3:a:wpmudev:defender_security:*:*:*:*:*:wordpress:*:* Versions up to 4.1.0 Vulnerable ·wpmudev

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-51490
  2. 2026-10-03 Alias added: GHSA-gh6x-qpj6-x25r

References

Advisory 1

  • TI-2023-04683 Defender Security < 4.1.0 - Protection Bypass (Hidden Login Page) CVSS 3.1MEDIUM 5.3
  • TI-2021-03282 Defender Security <= 2.4.6 - Cross-Site Request Forgery Bypass CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences