{"id":"CVE-2026-111862","state":"PUBLISHED","title":"Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code","description":"Rank Math SEO PRO for WordPress is affected by a supply-chain compromise in a subset of version 3.0.123 packages downloaded or updated between October 15, 2026 at 20:02 UTC and October 16, 2026 at 07:12 UTC. Rank Math states that the affected plugin files contained malware that could compromise a website if the plugin was activated and directs sites that activated an affected package to treat the website as compromised. The malware may establish persistent access, communicate with rank1cdn[.]com, recreate hidden backdoors on page visits, and expose WordPress credentials, database credentials, API keys, and other secrets accessible to the web server. Rank Math identifies three malicious wp_options keys, hidden PHP backdoors, unauthorized administrator accounts, a fake WordPress core file, PHP-executable .cache files, and a system cron marker as incident indicators. Only packages obtained during the vendor-confirmed window are claimed as affected; version 3.0.123 alone is not sufficient to establish compromise. Rank Math removed the affected files and released version 3.0.124 as the clean replacement.","publishedAt":"2026-10-19T16:35:59.949Z","updatedAt":"2026-10-20T14:10:31.918Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Wordfence"},"assigner":"Wordfence","products":["RankMath Rank Math SEO PRO"],"affected":[{"vendor":"RankMath","product":"Rank Math SEO PRO","defaultStatus":"unaffected","versions":[{"version":"3.0.123","status":"affected"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/81cd7a2c-ad0c-4dbc-b5dc-07ec866d5c1f?source=cve","https://rankmath.com/kb/pro-3-0-123-security-incident/","https://rankmath.com/changelog/","https://urlscan.io/result/01a145c2-8dc8-72ff-a65d-21209ca29c4f/","https://rdap.verisign.com/com/v1/domain/rank1cdn.com"],"weaknesses":["CWE-506"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111862.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111862","state":"PUBLISHED","datePublished":"2026-10-19T16:35:59.949Z","dateUpdated":"2026-10-20T14:10:31.918Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-10-17T02:00:53.250Z"},"containers":{"cna":{"title":"Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code","descriptions":[{"lang":"en","value":"Rank Math SEO PRO for WordPress is affected by a supply-chain compromise in a subset of version 3.0.123 packages downloaded or updated between October 15, 2026 at 20:02 UTC and October 16, 2026 at 07:12 UTC. Rank Math states that the affected plugin files contained malware that could compromise a website if the plugin was activated and directs sites that activated an affected package to treat the website as compromised. The malware may establish persistent access, communicate with rank1cdn[.]com, recreate hidden backdoors on page visits, and expose WordPress credentials, database credentials, API keys, and other secrets accessible to the web server. Rank Math identifies three malicious wp_options keys, hidden PHP backdoors, unauthorized administrator accounts, a fake WordPress core file, PHP-executable .cache files, and a system cron marker as incident indicators. Only packages obtained during the vendor-confirmed window are claimed as affected; version 3.0.123 alone is not sufficient to establish compromise. Rank Math removed the affected files and released version 3.0.124 as the clean replacement."}],"affected":[{"vendor":"RankMath","product":"Rank Math SEO PRO","defaultStatus":"unaffected","versions":[{"version":"3.0.123","status":"affected"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/81cd7a2c-ad0c-4dbc-b5dc-07ec866d5c1f?source=cve"},{"url":"https://rankmath.com/kb/pro-3-0-123-security-incident/"},{"url":"https://rankmath.com/changelog/"},{"url":"https://urlscan.io/result/01a145c2-8dc8-72ff-a65d-21209ca29c4f/"},{"url":"https://rdap.verisign.com/com/v1/domain/rank1cdn.com"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-506","lang":"en","description":"CWE-506 Embedded Malicious Code","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-10-19T16:35:59.949Z"},"timeline":[{"time":"2026-10-15T00:00:00.000Z","lang":"en","value":"Discovered"},{"time":"2026-10-16T00:00:00.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T14:10:17.459613Z","id":"CVE-2026-111862","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T14:10:31.918Z"}}]}}}