{"id":"CVE-2026-111862","title":"Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code","summary":"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 aff…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-506"],"vendor":"RankMath","product":"Rank Math SEO PRO","affected":["rank_math_seo_pro 3.0.123"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T16:35:59.949Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111862","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"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T17:33:42.474Z","slug":"CVE-2026-111862","body":"## Overview\n\nRank 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.\n\n## Affected\n\n- `rank_math_seo_pro 3.0.123`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}