CVE-2023-51490 MEDIUM

CVE-2023-51490: WordPress Defender Security Plugin <= 4.1.0 is vulnerable to Sensitive Data Exposure

Vendor Wpmu Dev
Product Defender Security – Malware Scanner, Login Security & Firewall
Weakness CWE-532 · Sensitive info in logs
Published January 8, 2024
Last update April 28, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

Defender Security plugin for WordPress versions up to 4.1.0 logs sensitive information in a way that allows unauthenticated attackers to read it. An attacker with network access can retrieve login credentials, API keys, or other confidential data stored in plugin logs without needing to authenticate or interact with a site administrator.

What an attacker can do

03Attacker Capabilities

Read sensitive data like login credentials and API keys from plugin logs without authentication.

Potential impact on your site

04Site Impact

Attackers can obtain credentials and secrets logged by the plugin, potentially leading to account compromise or further attacks.

Conditions required to exploit

05Prerequisites

Network access to the WordPress site; no authentication or user interaction required.

Key dates

06Disclosure timeline

January 8, 2024 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE