References to Advisories, Solutions, and Tools

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Change History

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.

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

https://wpscan.com/vulnerability/d1250410-b919-4a90-8cf2-04031f9e5e2b/

[{"vendor":"Unknown","product":"MonsterInsights Pro","defaultStatus":"unaffected","versions":[{"version":"10.2.0","lessThan":"11.0.0","versionType":"semver","status":"affected"}]}]