Description
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.
Published: 2026-09-05
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

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History

Mon, 07 Sep 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 07 Sep 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Inspireui
Inspireui mstore Api Create Native Android And Ios Apps On The Cloud
Wordpress
Wordpress wordpress
Vendors & Products Inspireui
Inspireui mstore Api Create Native Android And Ios Apps On The Cloud
Wordpress
Wordpress wordpress

Sat, 05 Sep 2026 05:45:00 +0000

Type Values Removed Values Added
Description 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.
Title MStore API <= 4.20.0 - Unauthenticated Authentication Bypass via 'id_token' Parameter JWT Forgery
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

Inspireui Mstore Api Create Native Android And Ios Apps On The Cloud
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-09-07T11:17:26.911Z

Reserved: 2026-06-26T16:43:47.206Z

Link: CVE-2026-13447

cve-icon Vulnrichment

Updated: 2026-09-07T11:15:23.522Z

cve-icon NVD

Status : Deferred

Published: 2026-09-05T06:17:09.403

Modified: 2026-09-08T13:12:58.310

Link: CVE-2026-13447

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-07T08:15:14Z

Weaknesses