VulnerabilityModified

CVE-2023-2734

The MStore API plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 3.9.1.

CRITICAL 9.8EPSS 3.81%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.81%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 3.81% probability · 90th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-288
Affected: inspireui/mstore api
Source: security@wordfence.com

EPSS trend

EPSS 3.8% since 4 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.