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TI-2026-13416 Aliases CVE-2026-16030GHSA-w2g6-85hw-mgcv

MStore API < 4.21.0 - Unauthenticated Account Takeover via Firebase Phone Authentication

Priority LOW 37CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

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

Summary

The MStore API WordPress plugin before 4.21.0 does not correctly verify the cryptographic signature of the token used to authenticate its phone-based login, allowing unauthenticated attackers who know a registered user's phone number to forge a token and take over that user's account, including administrator accounts.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00383 32nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed MStore API (Unknown): 4.21.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
UnknownMStore APIbefore 4.21.04.21.0Patch availableCNA
  • MStore API VendorUnknown Affected before 4.21.0 Fixed in 4.21.0 Patch available CNA

Remediation

  • Fix · CNA MStore API (Unknown) Fixed in 4.21.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    MStore API 4.21.0

    4 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-13422 MStore API < 4.21.0 - Unauthenticated Payment Bypass via Multiple Payment GatewaysPriority HIGH 80
    • TI-2026-13424 MStore API < 4.21.0 - Unauthenticated Product Review CreationPriority HIGH 72
    • TI-2026-13423 MStore API < 4.21.0 - Subscriber+ Order and Customer PII Disclosure via IDORPriority MEDIUM 62
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-16030
  2. 2026-10-03 Alias added: GHSA-w2g6-85hw-mgcv

References

Exploit 1

Sources

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