CVE-2026-11976

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{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-11976", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "state": "PUBLISHED", "assignerShortName": "WPScan", "dateReserved": "2026-06-11T12:56:22.681Z", "datePublished": "2026-08-06T16:40:18.955Z", "dateUpdated": "2026-08-07T13:47:29.290Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2026-08-06T16:40:18.955Z"}, "title": "MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise", "problemTypes": [{"descriptions": [{"description": "CWE-912 Hidden Functionality", "lang": "en", "type": "CWE"}]}], "affected": [{"vendor": "Unknown", "product": "MonsterInsights Pro", "versions": [{"status": "affected", "versionType": "semver", "version": "10.2.0", "lessThan": "11.0.0"}], "defaultStatus": "unaffected"}], "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."}], "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"}}], "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": {"id": "CVE-2026-11976", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-08-07T13:46:49.330878Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-912", "description": "CWE-912 Hidden Functionality"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-07T13:47:15.354Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "MonsterInsights Pro", "vendor": "Unknown", "versions": [{"lessThan": "11.0.0", "status": "affected", "version": "10.2.0", "versionType": "semver"}]}], "source": "contact@wpscan.com"}], "cveTags": [], "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."}], "id": "CVE-2026-11976", "lastModified": "2026-08-26T16:31:16.753", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "contact@wpscan.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-11976", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-07T13:46:49.330878Z", "version": "2.0.3"}}]}, "published": "2026-08-06T22:16:45.103", "references": [{"source": "contact@wpscan.com", "url": "https://wpscan.com/vulnerability/d1250410-b919-4a90-8cf2-04031f9e5e2b/"}], "sourceIdentifier": "contact@wpscan.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-912"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[10.2.0,11.0.0)"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 89.0, "source": "matching"}]}, "original": {"product": "MonsterInsights Pro", "source": "cna", "vendor": "Unknown"}, "product": "monsterinsights", "vendor": "monsterinsights"}], "created": "2026-08-07T01:45:05.273547+00:00", "updated": "2026-08-08T20:53:49.463477+00:00", "vendors": ["monsterinsights", "monsterinsights$PRODUCT$monsterinsights"]}