CVE-2026-11366: MonsterInsights (WordPress plugin) · Improper Authentication
Affects MonsterInsights (WordPress plugin)Source CVE Database V5
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
- 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:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| MonsterInsights | Affected
| Fixed in
|
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.