---
id: CVE-2026-104799
title: >-
  Mobile builder <= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation to
  wcfm-profile-settings REST Route 'key'/'data' Parameters
summary: >-
  The Mobile builder plugin for WordPress is vulnerable to Privilege Escalation
  in all versions up to, and including, 1.4.2 via the
  `wcfmmp_profile_settings()` REST handler exposed at `POST
  /mobile-builder/v1/wcfm-profile-settings`. This i…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-269
vendor: rnlab
product: Mobile builder
affected:
  - mobile_builder <= 1.4.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T14:40:00.750718Z'
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T15:18:54.602Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-104799'
references:
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/bc1a233e-ea62-4fb0-98eb-6b2aa893555d?source=cve
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L94
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L93
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L344
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L78
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L87
  - url: >-
      https://plugins.trac.wordpress.org/browser/mobile-builder/trunk/api/class-mobile-builder-wcfm.php#L88
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.407Z'
---

## Overview

The Mobile builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.4.2 via the `wcfmmp_profile_settings()` REST handler exposed at `POST /mobile-builder/v1/wcfm-profile-settings`. This is due to a PHP loose-comparison logic flaw in the meta key allow-list check — `strpos( $key, 'mobile_builder' ) == 0` evaluates to `true` for any key that does *not* contain the substring `'mobile_builder'` because `strpos()` returns `false` on no match and `false == 0` is `true` in PHP — combined with a `permission_callback` (`user_permissions_check`) that grants access to any authenticated user by only verifying `$user->exists()`. This makes it possible for authenticated attackers, with Subscriber-level access and above, to pass an unsanitized `data` array via the `key` and `data` parameters directly to `update_user_meta()`, overwriting arbitrary user meta on their own account — including the `wp_capabilities` meta key — to grant themselves Administrator-level privileges.

## Affected

- `mobile_builder <= 1.4.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.