CVE-2026-11366
MonsterInsights < 11.1.0 - Unauthenticated Measurement Protocol Secret Update via Empty-Key HMAC Bypass
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | monsterinsights |
| Published | Aug 4, 2026 |
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Affected Versions
Unknown / MonsterInsights
0 < 11.1.0
References
Credits
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