CVE-2026-7638 Missing authorization in App Builder – Create Native Android & iOS Apps On The Flight
Authenticated attackers can modify any user's avatar by manipulating the user_id parameter due to missing authorization checks in the App Builder plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-7638?
CVE-2026-7638 is a medium-severity missing authorization vulnerability in appcheap App Builder – Create Native Android & iOS Apps On The Flight, published on 2 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-639
Which versions are affected by CVE-2026-7638?
How do I fix CVE-2026-7638?
No fix has been published for CVE-2026-7638 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-7638 being exploited?
There is no known exploitation of CVE-2026-7638 in the wild and no public exploit code.
Sources
Also known as GHSA-5rjg-2j76-x2r5.