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TI-2026-11380 Aliases CVE-2026-13447GHSA-6wfp-pwm3-667v

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

Priority MEDIUM 50CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00691 53rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
inspireuiMStore API – Create Native Android & iOS Apps On The Cloudup to 4.20.0—No fix listedCNA
  • MStore API – Create Native Android & iOS Apps On The Cloud Vendorinspireui Affected up to 4.20.0 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:inspireui:mstore_api:*:*:*:*:*:*:*:*——inspireui
  • cpe:2.3:a:inspireui:mstore_api:*:*:*:*:*:*:*:* Versions — — ·inspireui

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-13447
  2. 2026-10-03 Alias added: GHSA-6wfp-pwm3-667v
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 7

  • TI-2023-02559 MStore API <= 3.9.2 - Authentication Bypass CVSS 3.1CRITICAL 9.8
  • TI-2023-02883 MStore API < 3.9.8 - Unauthenticated Blind SQLi CVSS 3.1CRITICAL 9.8
  • TI-2023-02882 MStore API < 3.9.9 - Unauthenticated Privilege Escalation CVSS 3.1CRITICAL 9.8
  • TI-2023-03070 MStore API <= 4.10.7 - Unauthorized Account Access and Privilege Escalation CVSS 3.1CRITICAL 9.8
  • TI-2023-02994 MStore API <= 4.0.1 - Unauthenticated SQL Injection CVSS 3.1CRITICAL 9.8
  • TI-2023-02561 MStore API <= 3.9.1 - Authentication Bypass CVSS 3.1CRITICAL 9.8
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences