Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Unknown MonsterInsights Pro — MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N C H H H 10.0 .0049 40.0 —
AFFECTED
Product Versions Fixed
MonsterInsights Pro 10.2.0 – —
TIMELINE
Jun 11 Reserved by WPScan
Aug 6 Published (CNA: WPScan)
Aug 7 EXPLOIT PUBLISHED — CVE-2026-11976 (Unknown MonsterInsights Pro). Public exploit reference added.
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| June 11, 2026 | Reserved | Reserved by WPScan |
| August 6, 2026 | Published | Published (CNA: WPScan) |
| August 7, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-11976 (Unknown MonsterInsights Pro). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Unknown | MonsterInsights Pro | — | 10.2.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-11976 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.