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VulnerabilityPublished

CVE-2026-11366: MonsterInsights (WordPress plugin) · Improper Authentication

Affects MonsterInsights (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 3.7 Low : upgrade to 11.1.0 when convenient.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 3.1 base score
3.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 11.1.0
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Upgrade MonsterInsights (WordPress plugin) to 11.1.0.

Affected software

ProductAffectedFixed in
MonsterInsightsAffected
  • <11.1.0
Fixed in
  • 11.1.0

Description

CVE-2026-11366 is a low-severity vulnerability in the MonsterInsights WordPress plugin versions before 11.1.0. It involves improper authentication due to incorrect validation of the signature on an unauthenticated AJAX action. When the plugin is not connected to Google Analytics, the HMAC signing key is empty, allowing unauthenticated attackers to forge a valid signature and overwrite a configuration value. This disrupts server-side analytics in Manual GA4 mode.

References

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