CVE-2023-3197: The MStore API plugin for WordPress is vulnerable to Unauthenticated Blind SQL Injection via the 'id' parameter in versions up to, and including, 4.0.1 due to insufficient escaping on the user supplie

critical Affects mstore-api (WordPress plugin). Feed 2026.10.29.4, updated 2026-10-29; published 2023-06-24; advisory modified 2026-06-17.

The MStore API plugin for WordPress is vulnerable to Unauthenticated Blind SQL Injection via the 'id' parameter in versions up to, and including, 4.0.1 due to insufficient escaping on the user supplie

Package: mstore-api (WordPress plugin) WordPress
Affected versions: <=4.0.1
Fixed in: no fix recorded
Severity: critical CVSS 9.8
Exploitation: not on CISA KEV · EPSS 4% (90.2th percentile)
Published: 2023-06-24
Source: nvd

References

CWE-89

NVD record mstore-api (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden wordpress /var/www/html

# or, without Composer
pipx install phpwarden   &&   phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs How findings are ranked

Related advisories

CVE-2023-2732 critical The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up same package: mstore-api (WordPress plugin)
CVE-2023-3077 critical The MStore API WordPress plugin before 3.9.8 does not sanitise and escape a parameter befo same package: mstore-api (WordPress plugin)
CVE-2023-2734 critical The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up same package: mstore-api (WordPress plugin)
CVE-2021-24148 critical A business logic issue in the MStore API WordPress plugin, versions before 3.2.0, had an a same package: mstore-api (WordPress plugin)
CVE-2023-3277 critical The MStore API plugin for WordPress is vulnerable to Unauthorized Account Access and Privi same package: mstore-api (WordPress plugin)
CVE-2023-3076 critical The MStore API WordPress plugin before 3.9.9 does not prevent visitors from creating user same package: mstore-api (WordPress plugin)