CVE-2026-5159 — Cross-Site Scripting (XSS)

title: CVE-2026-5159 - Royal Addons for Elementor Stored XSS via instagram_follow_text
id: scw-2026-05-05-ai-1
status: experimental
level: high
description: |
  Detects the specific Stored Cross-Site Scripting (XSS) vulnerability in the Royal Addons for Elementor plugin (CVE-2026-5159). This rule looks for the 'action=royal_elementor_instagram_feed' AJAX request and the presence of the 'instagram_follow_text' parameter containing typical XSS payload patterns like '<script>' and 'alert('. This targets the vulnerability where insufficient input sanitization allows for script injection.
author: SCW Feed Engine (AI-generated)
date: 2026-05-05
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-5159/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/wp-admin/admin-ajax.php'
      cs-uri-query|contains:
          - 'action=royal_elementor_instagram_feed'
      cs-uri-query|contains:
          - 'instagram_follow_text='
  selection_payload:
      cs-uri-query|contains:
          - '<script>'
      cs-uri-query|contains:
          - '</script>'
      cs-uri-query|contains:
          - 'alert('
  condition: selection AND selection_payload
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse