High severity · published Aug 7, 2026
CVE-2026-16030
MStore API < 4.21.0 - Unauthenticated Account Takeover via Firebase Phone Authentication
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
MStore API ·
before 4.21.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16030
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16030
wpscan.com
https://wpscan.com/vulnerability/adf8ffe0-39a2-4d26-af11-1ac807800735/
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