{"id":"CVE-2026-11976","state":"PUBLISHED","title":"MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise","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.","publishedAt":"2026-08-06T16:40:18.955Z","updatedAt":"2026-08-07T13:47:29.290Z","severity":{"score":10,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"WPScan"},"assigner":"WPScan","products":["Unknown MonsterInsights Pro"],"affected":[{"vendor":"Unknown","product":"MonsterInsights Pro","defaultStatus":"unaffected","versions":[{"version":"10.2.0","status":"affected","lessThan":"11.0.0","versionType":"semver"}]}],"references":["https://wpscan.com/vulnerability/d1250410-b919-4a90-8cf2-04031f9e5e2b/"],"weaknesses":["CWE-912"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/11xxx/CVE-2026-11976.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-11976","state":"PUBLISHED","datePublished":"2026-08-06T16:40:18.955Z","dateUpdated":"2026-08-07T13:47:29.290Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2026-06-11T12:56:22.681Z"},"containers":{"cna":{"title":"MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Unknown","product":"MonsterInsights Pro","defaultStatus":"unaffected","versions":[{"version":"10.2.0","status":"affected","lessThan":"11.0.0","versionType":"semver"}]}],"references":[{"url":"https://wpscan.com/vulnerability/d1250410-b919-4a90-8cf2-04031f9e5e2b/","tags":["exploit","vdb-entry","technical-description"]}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":10,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"description":"CWE-912 Hidden Functionality","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateUpdated":"2026-08-06T16:40:18.955Z"},"credits":[{"lang":"en","value":"Mike Gozdiskowski","type":"finder"},{"lang":"en","value":"WPScan","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"WPScan CVE Generator"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T13:46:49.330878Z","id":"CVE-2026-11976","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-912","type":"CWE","lang":"en","description":"CWE-912 Hidden Functionality"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-07T13:47:29.290Z"}}]}}}