CVE-2026-3568
The MStore API plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.18.3. This is due to the update_user_profile() function in controllers/flutter-user.php processing the 'meta_data' JSON parameter without any allowlist, blocklist, or validation of meta keys.
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The function reads raw JSON from php://input (line 1012), decodes it (line 1013), authenticates the user via cookie validation (line 1015), and then directly iterates over the user-supplied meta_data array passing arbitrary keys and values to update_user_meta() (line 1080) with no sanitization or restrictions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary user meta fields on their own accounts, including sensitive fields like wp_user_level (to escalate to administrator-level legacy checks), plugin-specific authorization flags (e.g., _wpuf_user_active, aiowps_account_status), and billing/profile fields with unsanitized values (potentially enabling Stored XSS in admin contexts). Note that wp_capabilities cannot be directly exploited this way because it requires a serialized array value, but wp_user_level (a simple integer) and numerous plugin-specific meta keys are exploitable.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Puntuación base: 4.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.36%
- Percentil entre todas las CVEs puntuadas: 28
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-639
Referencias
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1078
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1080
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1012
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve
JSON original (NVD)
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{
"id": "CVE-2026-3568",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-3568",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-09T12:59:03.231688Z"
}
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"type": "Secondary",
"source": "security@wordfence.com",
"cvssData": {
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"version": "3.1",
"baseScore": 4.3,
"attackVector": "NETWORK",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 2.8
}
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"affected": [
{
"source": "security@wordfence.com",
"affectedData": [
{
"vendor": "inspireui",
"product": "MStore API – Create Native Android & iOS Apps On The Cloud",
"versions": [
{
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"version": "0",
"versionType": "semver",
"lessThanOrEqual": "4.18.3"
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"defaultStatus": "unaffected"
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],
"published": "2026-04-09T04:16:59.177",
"references": [
{
"url": "https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012",
"source": "security@wordfence.com"
},
{
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{
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"url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078",
"source": "security@wordfence.com"
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{
"url": "https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080",
"source": "security@wordfence.com"
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{
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=",
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"source": "security@wordfence.com"
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],
"vulnStatus": "Deferred",
"weaknesses": [
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"type": "Secondary",
"source": "security@wordfence.com",
"description": [
{
"lang": "en",
"value": "CWE-639"
}
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],
"descriptions": [
{
"lang": "en",
"value": "The MStore API plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.18.3. This is due to the update_user_profile() function in controllers/flutter-user.php processing the 'meta_data' JSON parameter without any allowlist, blocklist, or validation of meta keys. The function reads raw JSON from php://input (line 1012), decodes it (line 1013), authenticates the user via cookie validation (line 1015), and then directly iterates over the user-supplied meta_data array passing arbitrary keys and values to update_user_meta() (line 1080) with no sanitization or restrictions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary user meta fields on their own accounts, including sensitive fields like wp_user_level (to escalate to administrator-level legacy checks), plugin-specific authorization flags (e.g., _wpuf_user_active, aiowps_account_status), and billing/profile fields with unsanitized values (potentially enabling Stored XSS in admin contexts). Note that wp_capabilities cannot be directly exploited this way because it requires a serialized array value, but wp_user_level (a simple integer) and numerous plugin-specific meta keys are exploitable."
},
{
"lang": "es",
"value": "El plugin MStore API para WordPress es vulnerable a Referencia Directa a Objeto Insegura en todas las versiones hasta la 4.18.3, inclusive. Esto se debe a que la función update_user_profile() en controllers/flutter-user.php procesa el parámetro JSON 'meta_data' sin ninguna lista blanca, lista negra o validación de claves meta. La función lee JSON sin procesar de php://input (línea 1012), lo decodifica (línea 1013), autentica al usuario mediante validación de cookie (línea 1015), y luego itera directamente sobre el array meta_data proporcionado por el usuario pasando claves y valores arbitrarios a update_user_meta() (línea 1080) sin saneamiento ni restricciones. Esto hace posible que atacantes autenticados, con acceso de nivel Suscriptor y superior, modifiquen campos meta de usuario arbitrarios en sus propias cuentas, incluyendo campos sensibles como wp_user_level (para escalar a comprobaciones heredadas de nivel de administrador), indicadores de autorización específicos del plugin (por ejemplo, _wpuf_user_active, aiowps_account_status), y campos de facturación/perfil con valores no saneados (lo que podría habilitar XSS Almacenado en contextos de administrador). Tenga en cuenta que wp_capabilities no puede ser explotado directamente de esta manera porque requiere un valor de array serializado, pero wp_user_level (un entero simple) y numerosas claves meta específicas del plugin son explotables."
}
],
"lastModified": "2026-07-24T21:10:00.143",
"sourceIdentifier": "security@wordfence.com"
}