CVE-2026-11976 (GCVE-0-2026-11976)

Vulnerability from cvelistv5 – Published: 2026-08-06 16:40 – Updated: 2026-08-07 13:47
VLAI
Title
MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise
Summary
The official MonsterInsights Pro update distribution bucket (`monster-insights.s3.amazonaws.com`) was compromised. Both the current release (10.2.2) and the version MonsterInsights rolled back to (10.2.0) contain a malicious file, `class-system-check.php`. Three distinct variants were observed on 2026-06-11, all sharing the same AES-256-GCM key, confirming a single threat actor. The attacker retains write access to the S3 bucket and has been actively iterating on the payload throughout the day.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 13:46 UTC
CWE
Assigner
References
URL Tags
https://wpscan.com/vulnerability/d1250410-b919-4a… exploitvdb-entrytechnical-description
Impacted products
Vendor Product Version CPE status
Unknown MonsterInsights Pro Affected: 10.2.0 , < 11.0.0 (semver)
guessed Create a notification for this product.
Credits
Mike Gozdiskowski WPScan
Show details on NVD website
To clipboard 

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