CVE-2026-11366
Received Received - Intake

Authentication Bypass in MonsterInsights Plugin

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: WPScan

Description
The MonsterInsights WordPress plugin before 11.1.0 does not correctly validate the signature on one of its unauthenticated AJAX actions: when the MonsterInsights WordPress plugin before 11.1.0 is not connected to Google Analytics the HMAC signing key is empty, which lets unauthenticated attackers forge a valid signature and overwrite a MonsterInsights WordPress plugin before 11.1.0 configuration value, disrupting the MonsterInsights WordPress plugin before 11.1.0's server-side analytics in Manual GA4 mode.

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Meta Information

Published
2026-08-04
Last Modified
2026-08-04
Generated
2026-08-04
AI Q&A
2026-08-04
EPSS Evaluated
N/A
NVD
CVE-2026-11366
EUVD
EUVD-2026-52582

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
monsterinsights wordpress_plugin to 11.1.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the MonsterInsights WordPress plugin before version 11.1.0. When not connected to Google Analytics, the plugin uses an empty HMAC signing key. This allows unauthenticated attackers to forge a valid signature and overwrite a plugin configuration value, disrupting analytics in Manual GA4 mode.

Impact Analysis

An attacker could exploit this to alter your plugin settings without authentication, potentially disrupting your website's analytics tracking or causing incorrect data collection.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it only impacts the MonsterInsights plugin's analytics functionality. There is no evidence of data exposure or unauthorized access to sensitive information.

Mitigation Strategies

Update the MonsterInsights WordPress plugin to version 11.1.0 or later to ensure proper signature validation and prevent unauthenticated attacks.

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