CVE-2026-16030

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

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.

Affected

MStore API

CVSS v3.1 CNA

8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.38% chance of exploitation in the next 30 days, 31st percentile

Published

2026-08-07

Proof-of-concept exploits (1)

• https://wpscan.com/vulnerability/adf8ffe0-39a2-4d26-af11-1ac807800735/

References

• CVE Record
• NVD entry