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TI-2026-13424 Aliases CVE-2026-16041GHSA-9px3-jf5v-3473

MStore API < 4.21.0 - Unauthenticated Product Review Creation

Priority HIGH 72CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.

Summary

The MStore API WordPress plugin before 4.21.0 does not perform authorization or purchase-ownership checks on its REST product-review creation route, allowing an unauthenticated attacker to create WooCommerce product reviews with an attacker-chosen reviewer name, email and star rating on stores configured to accept reviews only from verified owners.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-08
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
Poc
Automatable
Yes
Technical impact
Partial

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-2026-13423 MStore API < 4.21.0 - Subscriber+ Order and Customer PII Disclosure via IDORPriority MEDIUM 62
    • TI-2026-13416 MStore API < 4.21.0 - Unauthenticated Account Takeover via Firebase Phone AuthenticationPriority LOW 37
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-16041
  2. 2026-10-03 Alias added: GHSA-9px3-jf5v-3473

References

Exploit 1

Sources

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