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CVE-2026-11366

Low

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.

SeverityLow
CVSS3.7
Exploit probability—
ProductMonsterInsights
PublishedAug 4, 2026
First seenAug 4, 2026
Weakness typeCWE-287Improper authentication

How to fix

Update
  • MonsterInsights11.1.0 or later

Affected products

ProductAffected versionsFixed in
MonsterInsightsv < 11.1.011.1.0

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