# CVE-2026-3568: MStore API IDOR in update_user_profile

Source: https://junglewise.ai/threats/cve-2026-3568-mstore-api-idor-in-update-user-profile  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-3568 · Severity: medium · CVSS 4.3 · Published 2026-04-09

The MStore API plugin for WordPress, which helps build mobile apps for websites, contains a security flaw that allows logged-in users to modify their own account settings. An attacker with a basic account could change sensitive internal data fields to gain higher-level permissions or bypass certain security restrictions. This could lead to unauthorized access to administrative features or the injection of malicious scripts into the website's management interface.

Technologies: [InspireUI MStore API](https://junglewise.ai/threats/technologies/mstore-api). Vendors: [InspireUI](https://junglewise.ai/threats/vendors/inspireui).

## Quick answers

**Is CVE-2026-3568 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3568 being exploited in the wild.

**How severe is CVE-2026-3568?** Medium severity, with a CVSS score of 4.3, published 9 April 2026.

**Which products and versions are affected?** InspireUI MStore API <= 4.18.3.

**Is there a fix for CVE-2026-3568?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-3568 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-3568?** Check whether you run InspireUI MStore API at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an Insecure Direct Object Reference (IDOR) within the update_user_profile() function in controllers/flutter-user.php. The function processes the 'meta_data' JSON parameter from php://input without implementing an allowlist or validating meta keys before passing them to the update_user_meta() function. An authenticated attacker with Subscriber-level access can exploit this to modify sensitive meta fields such as 'wp_user_level' for legacy privilege escalation or various plugin-specific authorization flags. Additionally, the lack of sanitization on these values may allow for Stored XSS in administrative contexts. A patch was released in version 4.18.4 (implied by the 'up to and including 4.18.3' range).

## Affected products

- inspireui MStore API – Create Native Android & iOS Apps On The Cloud <= 4.18.3

## Timeline

- 2026-04-09: disclosed
- 2026-04-09: advisory

## References

- [https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/tags/4.18.3/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php](https://plugins.trac.wordpress.org/browser/mstore-api/trunk/controllers/flutter-user.php)
- [https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=](https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3494266%40mstore-api&new=3494266%40mstore-api&sfp_email=&sfph_mail=)

## Related threats

- [FluxBuilder MStore API authentication bypass in password recovery](https://junglewise.ai/threats/cve-2026-54817-fluxbuilder-mstore-api-authentication-bypass-in-password-recovery)