CVE-2026-7638 — The App Builder – Create Native Android & iOS Apps On The

title: CVE-2026-7638 - App Builder Upload Avatar IDOR
id: scw-2026-05-02-ai-1
status: experimental
level: high
description: |
  Detects the specific Insecure Direct Object Reference (IDOR) vulnerability in the App Builder plugin for WordPress (CVE-2026-7638). This rule looks for POST requests to the '/wp-json/app-builder/v1/upload-avatar' endpoint that include a 'user_id' parameter in the query string. This indicates an attempt to exploit the vulnerability where an authenticated user can modify the avatar of any user by specifying their user ID.
author: SCW Feed Engine (AI-generated)
date: 2026-05-02
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7638/
tags:
  - attack.privilege_escalation
  - attack.t1078.001
logsource:
    category: webserver
detection:
  selection:
      cs-method:
          - 'POST'
      uri|endswith:
          - '/wp-json/app-builder/v1/upload-avatar'
      cs-uri-query|contains:
          - 'user_id='
  selection_base:
      sc-status:
          - 200
  condition: selection AND selection_base
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse