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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| rnlab | Mobile builder | unaffected |
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Fixes
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References
History
Wed, 04 Nov 2026 11:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Mobile builder <= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation to wcfm-profile-settings REST Route 'key'/'data' Parameters | |
| Weaknesses | CWE-269 | |
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| Metrics |
cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: Wordfence
Published:
Updated: 2026-11-04T11:26:23.248Z
Reserved: 2026-10-02T13:14:22.775Z
Link: CVE-2026-104799
Vulnrichment
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NVD
Status : Deferred
Published: 2026-11-04T12:17:05.713
Modified: 2026-11-04T12:17:05.843
Link: CVE-2026-104799
Redhat
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OpenCVE Enrichment
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Weaknesses