CVE-2025-12826 MEDIUM

CVE-2025-12826: Custom Post Type UI <= 1.18.0 - Missing Authorization to Unauthenticated (Previously Administrator+) Custom Post Type Modification

Vendor Webdevstudios
Product Custom Post Type UI
Weakness CWE-862 · Missing authorization
Published December 4, 2025
Last update April 8, 2026

CVSS base score

4.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The Custom Post Type UI plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.18.0. This is due to the plugin not verifying that a user has the required capability to perform actions in the "cptui_process_post_type" function. This makes it possible for authenticated attackers, with subscriber level access and above, to add, edit, or delete custom post types in limited situations.

Explanation of Vulnerability in Simple Terms

02Summary

Custom Post Type UI through version 1.18.0 does not properly check user permissions before allowing certain actions. An attacker without authentication can modify post type settings or data, though the impact is limited to integrity and availability of the affected component. Update to a version newer than 1.18.0.

What an attacker can do

03Attacker Capabilities

Modify post type settings or data without being logged in.

Potential impact on your site

04Site Impact

Unauthorized changes to custom post type configuration or content integrity issues.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

December 4, 2025 CVE published
April 8, 2026 Record updated