MStore API <= 4.18.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Meta Update_CVE-2026-3568

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-09T02:25:06.702Z",
    "modified": "2026-04-09T12:59:11.618Z",
    "type": "cve",
    "title": "MStore API <= 4.18.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Meta Update",
    "source": "Wordfence",
    "references": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve\nhttps://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078\nhttps://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080\nhttps://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1080\nhttps://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1012\nhttps://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012\nhttps://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1078\nhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=",
    "id": "CVE-2026-3568",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "inspireui MStore API \u2013 Create Native Android & iOS Apps On The Cloud 0",
    "sourceHref": "",
    "cvss": {
        "score": 4.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "MStore API \u2013 Create Native Android & iOS Apps On The Cloud",
    "version": "0",
    "vendor": "inspireui",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}