Vulnerability-Lookup

FKIE_CVE-2026-111862

Vulnerability from fkie_nvd - Published: 2026-10-19 17:17 - Updated: 2026-10-19 20:43

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 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.

References

	URL	Tags
	security@wordfence.com	https://rankmath.com/changelog/
	security@wordfence.com	https://rankmath.com/kb/pro-3-0-123-security-incident/
	security@wordfence.com	https://rdap.verisign.com/com/v1/domain/rank1cdn.com
	security@wordfence.com	https://urlscan.io/result/01a145c2-8dc8-72ff-a65d-21209ca29c4f/
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/81cd7a2c-ad0c-4dbc-b5dc-07ec866d5c1f?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Rank Math SEO PRO",
          "vendor": "RankMath",
          "versions": [
            {
              "status": "affected",
              "version": "3.0.123"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-111862",
  "lastModified": "2026-10-19T20:43:24.237",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-10-19T17:17:04.507",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://rankmath.com/changelog/"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://rankmath.com/kb/pro-3-0-123-security-incident/"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://rdap.verisign.com/com/v1/domain/rank1cdn.com"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://urlscan.io/result/01a145c2-8dc8-72ff-a65d-21209ca29c4f/"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/81cd7a2c-ad0c-4dbc-b5dc-07ec866d5c1f?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-506"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}

CVE-2026-111862 (GCVE-0-2026-111862)

Vulnerability from cvelistv5 – Published: 2026-10-19 16:35 – Updated: 2026-10-19 16:35

Title

Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-506 - Embedded Malicious Code

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2260 records in the last 180 days details

References

5 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://rankmath.com/kb/pro-3-0-123-security-incident/
https://rankmath.com/changelog/
https://urlscan.io/result/01a145c2-8dc8-72ff-a65d…
https://rdap.verisign.com/com/v1/domain/rank1cdn.com

Impacted products

1 product

Vendor	Product	Version
RankMath	Rank Math SEO PRO	Affected: 3.0.123

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Rank Math SEO PRO",
          "vendor": "RankMath",
          "versions": [
            {
              "status": "affected",
              "version": "3.0.123"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-506",
              "description": "CWE-506 Embedded Malicious Code",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T16:35:59.949Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "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"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-15T00:00:00.000Z",
          "value": "Discovered"
        },
        {
          "lang": "en",
          "time": "2026-10-16T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Rank Math SEO PRO 3.0.123 - Unauthenticated Embedded Malicious Code"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-111862",
    "datePublished": "2026-10-19T16:35:59.949Z",
    "dateReserved": "2026-10-17T02:00:53.250Z",
    "dateUpdated": "2026-10-19T16:35:59.949Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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