MStore API <= 4.18.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Meta Update
| CVE | CVE-2026-3568 |
|---|---|
| CVSS | 4.3 (Medium) |
| Publicly Published | April 8, 2026 |
| Last Updated | April 9, 2026 |
| Researcher |
Osvaldo Noe Gonzalez Del Rio (Os)
- krei.dev | ogbuilders.io
|
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.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for MStore API – Create Native Android & iOS Apps On The Cloud
| Software Type | Plugin |
|---|---|
| Software Slug | mstore-api (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 4.18.4, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in MStore API – Create Native Android & iOS Apps On The Cloud
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