CVE-2026-11976 — MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise
The official MonsterInsights Pro update distribution bucket (`monster-insights.s3.amazonaws.com`) was compromised. Both the current release (10.2.2) and the version MonsterInsig…
Published: 2026-08-06 · CVSS: 10.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7