CVE-2025-15370 MEDIUM

CVE-2025-15370: Shield Security <= 21.0.9 - Authenticated (Subscriber+) Insecure Direct Object Reference to Disable Google Authenticator

Vendor Paultgoodchild
Product Shield: Blocks Bots, Protects Users, and Prevents Security Breaches
Weakness CWE-639 · IDOR
Published January 16, 2026
Last update April 8, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

The Shield: Blocks Bots, Protects Users, and Prevents Security Breaches plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 21.0.9 via the MfaGoogleAuthToggle class due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to disable Google Authenticator for any user.

Explanation of Vulnerability in Simple Terms

02Summary

Shield version 21.0.9 and earlier contains an authorization flaw that allows authenticated users to modify data they should not have access to. An attacker with a low-privilege account can alter information through the application's network interface without user interaction. The vulnerability affects the integrity of stored data but does not expose sensitive information or cause service disruption.

What an attacker can do

03Attacker Capabilities

Modify data or settings they should not have permission to change.

Potential impact on your site

04Site Impact

Authenticated users can alter site data or configuration outside their intended permissions.

Conditions required to exploit

05Prerequisites

Attacker must have a low-privilege user account on the site.

Key dates

06Disclosure timeline

January 16, 2026 CVE published
April 8, 2026 Record updated