{"id":"CVE-2026-11976","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-11976","generatedAt":"2026-10-28T00:52:28.616Z","title":"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`.","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.","published":"2026-08-06T22:16:45.000Z","lastModified":"2026-08-26T16:31:17.000Z","status":"Deferred","sourceIdentifier":"contact@wpscan.com","cvss":{"version":"3.1","score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-912"],"affected":[],"epss":{"score":0.00522,"percentile":0.4403,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://wpscan.com/vulnerability/d1250410-b919-4a90-8cf2-04031f9e5e2b/","source":"contact@wpscan.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11976","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}