CVE-2023-47189: WordPress Defender Security plugin <= 4.2.0 - Masked Login Area View Bypass vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-04 · updated 2026-06-17
Weakness: CWE-287

Description

Improper Authentication vulnerability in WPMU DEV Defender Security allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects Defender Security: from n/a through 4.2.0.

Affected products

WPMU DEV Defender Security: before 4.2.1 — fixed in 4.2.1

How to fix

Upgrade to a fixed version: WPMU DEV Defender Security 4.2.1. Check the vendor advisory for mitigations.

References

https://patchstack.com/database/vulnerability/defender-security/wordpress-defender-securit-plugin-4-2-0-masked-login-area-view-bypass-vulnerability?_s_id=cve
https://patchstack.com/database/vulnerability/defender-security/wordpress-defender-securit-plugin-4-2-0-masked-login-area-view-bypass-vulnerability?_s_id=cve

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