CVE-2026-6812 — Server-Side Request Forgery

title: WordPress Ona Theme SSRF via ona_activate_child_theme — CVE-2026-6812
id: scw-2026-05-02-ai-1
status: experimental
level: high
description: |
  Detects exploitation of CVE-2026-6812 in the Ona WordPress theme. This rule specifically looks for the 'ona_activate_child_theme' action in 'admin-ajax.php' requests, combined with the presence of the 'theme_url=' parameter, which is used to trigger the Server-Side Request Forgery vulnerability. This allows authenticated administrators to make requests to arbitrary locations from the web server.
author: SCW Feed Engine (AI-generated)
date: 2026-05-02
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-6812/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/wp-admin/admin-ajax.php'
      cs-uri-query|contains:
          - 'action=ona_activate_child_theme'
      cs-uri-query|contains:
          - 'theme_url='
  selection_base:
      cs-method:
          - 'POST'
  condition: selection AND selection_base
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse