CVE-2026-3568
MStore API <= 4.18.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Meta Update
- Published
- Updated
- Reserved
- Assigned by
- Wordfence
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| WordfenceCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
inspireui · MStore API – Create Native Android & iOS Apps On The Cloud
- affected ≤ 4.18.3
References (8)
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a77bc126-4dbd-4a26-b98c-946341d4282f?source=cve (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1078 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1080 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1080 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php#L1012 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1012 (opens in a new tab)
- https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php#L1078 (opens in a new tab)
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail= (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-3568)Record last updated .