What is CVE-2023-2734?

CVE-2023-2734 is a critical-severity vulnerability in Inspireui Mstore API, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2023-05-25.

How severe is CVE-2023-2734?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-2734 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Inspireui Mstore API

CVE-2023-2734

The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.9.1. This is due to insufficient verification on the user being supplied during the cart sync from mobile REST API request through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the user id.

Published 2023-05-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.038 (89.7th percentile), scored 2026-09-28.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.038 · newest: 0.038 · change: 0.000

Affected products

Inspireui Mstore API
Inspireui Mstore API – Create Native Android & iOS Apps On The Cloud — versions 0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

Public proof-of-concept exploits

References

www.wordfence.com/threat-intel/vulnerabilities/id/5881d16c-84e8-4610-8233-cfa5a… (Third Party Advisory)
plugins.trac.wordpress.org/browser/mstore-api/tags/3.9.0/controllers/flutter-wo… (Patch)
plugins.trac.wordpress.org/changeset (Patch)

Frequently asked questions

What is CVE-2023-2734?: CVE-2023-2734 is a critical-severity vulnerability in Inspireui Mstore API, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2023-05-25.
How severe is CVE-2023-2734?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-2734 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.