Reported vulnerability

App Builder <= 5.6.1 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary User Avatar Modification via 'user_id' Parameter

Q: Which versions of App Builder – Create Native Android & iOS Apps On The Flight are affected?

Wordfence lists these affected versions: Start version unspecified, through 5.6.1. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for App Builder – Create Native Android & iOS Apps On The Flight?

Wordfence reports a fix for this issue in App Builder – Create Native Android & iOS Apps On The Flight. It lists these fixed versions: 5.7.0. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 1 May 2026

Updated 14 Sept 2026

CVE-2026-7638

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 5.3

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 5.6.1. 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.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

App Builder – Create Native Android & iOS Apps On The Flight

Software: plugin · app-builder
Affected versions: Start version unspecified, through 5.6.1
Fix availability: Fix available
Fixed versions: 5.7.0

Recommended action

Update to version 5.7.0, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/2d532ffc-c6f1-41e3-9a59-0706802ab8e2?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of App Builder – Create Native Android & iOS Apps On The Flight are affected?

Wordfence lists these affected versions: Start version unspecified, through 5.6.1. Use the version checker above to compare your installed release with this report.

Is a fix available for App Builder – Create Native Android & iOS Apps On The Flight?

Wordfence reports a fix for this issue in App Builder – Create Native Android & iOS Apps On The Flight. It lists these fixed versions: 5.7.0. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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