---
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'
---

## Overview

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

- `rank_math_seo_pro 3.0.123`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.