App Builder <= 5.5.10 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary User Avatar Modification via 'user_id' Parameter
Summary
| CVE | CVE-2026-7638 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-02 04:16:23 UTC |
| Updated | 2026-05-02 04:16:23 UTC |
| Description | The App Builder – Create Native Android & iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint. |
Risk And Classification
Primary CVSS: v3.1 5.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Problem Types: CWE-639 | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 3.1 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Appcheap | App Builder Create Native Android IOS Apps On The Flight | affected 5.6.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/Uplo... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Di/Service/Auth/Uplo... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Traits/Permission.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvat... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/2d532ffc-c6f1-41e3-9a59-07068... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/Uploa... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/trunk/includes/Di/Service/Auth/UploadAvat... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Di/Service/Auth/Uploa... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/tags/5.6.0/includes/Traits/Permission.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/app-builder/tags/5.5.10/includes/Traits/Permission.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Ren Voza (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-01T15:33:11.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.