{"id":"CVE-2026-104799","aliases":["EUVD-2026-116885","GHSA-9pxh-r9hv-cxqf"],"status":"published","title":"Mobile builder \u003c= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation to wcfm-profile-settings REST Route 'key'/'data' Parameters","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-\u003eexists()`. 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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00387,"percentile":0.33249,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2026-11-04T11:26:23Z","modified":"2026-11-04T12:31:34Z","products":[{"vendor":"mobile builder","product":"mobile builder"},{"vendor":"rnlab","product":"mobile builder"}],"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"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104799"},{"url":"https://github.com/advisories/GHSA-9pxh-r9hv-cxqf"}],"sources":{"cve":[{"id":"CVE-2026-104799","title":"Mobile builder \u003c= 1.4.2 - Authenticated (Subscriber+) Privilege Escalation to wcfm-profile-settings REST Route 'key'/'data' Parameters","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-\u003eexists()`. 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.","status":"published","published":"2026-11-04T11:26:23.248Z","modified":"2026-11-04T15:18:54.602Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-269"],"updated_at":"2026-11-04T16:33:47.459854Z"}],"euvd":[{"id":"EUVD-2026-116885","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-\u003eexists()`. 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.","status":"published","published":"2026-11-04T11:26:23Z","modified":"2026-11-04T15:18:54Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T16:10:35.925015Z"}],"ghsa":[{"id":"GHSA-9pxh-r9hv-cxqf","title":"The Mobile builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up...","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-\u003eexists()`. 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.","status":"published","published":"2026-11-04T12:31:33Z","modified":"2026-11-04T12:31:34Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-04T12:34:56.311878Z"}],"nvd":[{"id":"CVE-2026-104799","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-\u003eexists()`. 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.","status":"published","published":"2026-11-04T12:17:05.713Z","modified":"2026-11-04T16:17:31.25Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-269"],"updated_at":"2026-11-04T18:06:27.082964Z"}]}}