Vulnerability-Lookup

GHSA-6WFP-PWM3-667V

Vulnerability from github – Published: 2026-09-05 06:32 – Updated: 2026-09-05 06:32

Details

The Mstore Api plugin for WordPress is vulnerable to Authentication Bypass via JWT Forgery in versions up to, and including, 4.20.0 This is due to missing cryptographic signature verification in the FirebasePhoneAuthHelper::verify_id_token() function, which decodes and validates Firebase ID token claims (alg, kid, aud, iss) but never calls openssl_verify() or any equivalent to validate the JWT signature against Google's actual public key certificates. This makes it possible for unauthenticated attackers to forge a Firebase Phone Auth JWT signed with a self-generated RSA key pair and impersonate any phone number, resulting in unauthorized access to existing WordPress accounts or creation of new arbitrary accounts.

Severity

9.8 (Critical)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-13447"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-05T06:17:09Z",
    "severity": "CRITICAL"
  },
  "details": "The Mstore Api plugin for WordPress is vulnerable to Authentication Bypass via JWT Forgery in versions up to, and including, 4.20.0 This is due to missing cryptographic signature verification in the FirebasePhoneAuthHelper::verify_id_token() function, which decodes and validates Firebase ID token claims (alg, kid, aud, iss) but never calls openssl_verify() or any equivalent to validate the JWT signature against Google\u0027s actual public key certificates. This makes it possible for unauthenticated attackers to forge a Firebase Phone Auth JWT signed with a self-generated RSA key pair and impersonate any phone number, resulting in unauthorized access to existing WordPress accounts or creation of new arbitrary accounts.",
  "id": "GHSA-6wfp-pwm3-667v",
  "modified": "2026-09-05T06:32:38Z",
  "published": "2026-09-05T06:32:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13447"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.4/controllers/flutter-user.php#L829"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.4/controllers/flutter-user.php#L940"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.4/controllers/helpers/firebase-phone-auth-helper.php#L5"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L829"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L940"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/helpers/firebase-phone-auth-helper.php#L5"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/4a1127af-74f6-4748-9aee-5a8c6c2766a4?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-13447 (GCVE-0-2026-13447)

Vulnerability from cvelistv5 – Published: 2026-09-05 05:30 – Updated: 2026-09-07 11:17

Title

MStore API <= 4.20.0 - Unauthenticated Authentication Bypass via 'id_token' Parameter JWT Forgery

Summary

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-07 11:08 UTC

CWE

CWE-287 - Improper Authentication

Assigner

Wordfence mitre root

References

7 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/mstore…
https://plugins.trac.wordpress.org/browser/mstore…
https://plugins.trac.wordpress.org/browser/mstore…
https://plugins.trac.wordpress.org/browser/mstore…
https://plugins.trac.wordpress.org/browser/mstore…
https://plugins.trac.wordpress.org/browser/mstore…

Impacted products

1 product

Vendor	Product	Version
inspireui	MStore API – Create Native Android & iOS Apps On The Cloud	Affected: 0 , ≤ 4.20.0 (semver)

Credits

t4g0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-13447",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-07T11:08:56.472544Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-07T11:17:26.911Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "MStore API \u2013 Create Native Android \u0026 iOS Apps On The Cloud",
          "vendor": "inspireui",
          "versions": [
            {
              "lessThanOrEqual": "4.20.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "t4g0"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Mstore Api plugin for WordPress is vulnerable to Authentication Bypass via JWT Forgery in versions up to, and including, 4.20.0 This is due to missing cryptographic signature verification in the FirebasePhoneAuthHelper::verify_id_token() function, which decodes and validates Firebase ID token claims (alg, kid, aud, iss) but never calls openssl_verify() or any equivalent to validate the JWT signature against Google\u0027s actual public key certificates. This makes it possible for unauthenticated attackers to forge a Firebase Phone Auth JWT signed with a self-generated RSA key pair and impersonate any phone number, resulting in unauthorized access to existing WordPress accounts or creation of new arbitrary accounts."
        }
      ],
      "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": [
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          "descriptions": [
            {
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        "dateUpdated": "2026-09-05T05:30:54.459Z",
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      "references": [
        {
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        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/helpers/firebase-phone-auth-helper.php#L5"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L940"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L829"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.4/controllers/helpers/firebase-phone-auth-helper.php#L5"
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        {
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      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-06-26T17:05:18.000Z",
          "value": "Vendor Notified"
        },
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          "lang": "en",
          "time": "2026-09-04T17:19:59.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "MStore API \u003c= 4.20.0 - Unauthenticated Authentication Bypass via \u0027id_token\u0027 Parameter JWT Forgery"
    }
  },
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    "datePublished": "2026-09-05T05:30:54.459Z",
    "dateReserved": "2026-06-26T16:43:47.206Z",
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    "state": "PUBLISHED"
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}

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.

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.

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GHSA-6WFP-PWM3-667V

CVE-2026-13447 (GCVE-0-2026-13447)

Tags

Sightings

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