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.
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Affected Vendors & Products
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History
Mon, 07 Sep 2026 12:30:00 +0000
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ssvc
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Mon, 07 Sep 2026 08:30:00 +0000
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Inspireui
Inspireui mstore Api Create Native Android And Ios Apps On The Cloud Wordpress Wordpress wordpress |
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Inspireui
Inspireui mstore Api Create Native Android And Ios Apps On The Cloud Wordpress Wordpress wordpress |
Sat, 05 Sep 2026 05:45:00 +0000
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| 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 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published: 2026-09-05T05:30:54.459Z
Updated: 2026-09-07T11:17:26.911Z
Reserved: 2026-06-26T16:43:47.206Z
Link: CVE-2026-13447
Updated: 2026-09-07T11:15:23.522Z
Status : Deferred
Published: 2026-09-05T06:17:09.403
Modified: 2026-09-08T13:12:58.310
Link: CVE-2026-13447
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