CVE-2026-42872 — Cross-Site Scripting (XSS)

title: CVE-2026-42872 - WeGIA lista_arquivos_etapa.php XSS via id_processo
id: scw-2026-05-11-ai-1
status: experimental
level: medium
description: |
  Detects attempts to exploit CVE-2026-42872 by looking for requests to lista_arquivos_etapa.php with the id_processo parameter containing common XSS payloads like '<script>', 'alert(', 'onerror=', or 'javascript:'. This targets the specific vulnerability in WeGIA versions prior to 3.7.0.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42872/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/lista_arquivos_etapa.php?'
      cs-uri-query|contains:
          - 'id_processo='
      cs-uri-query|contains:
          - '<script>'
      cs-uri-query|contains:
          - 'alert('
      cs-uri-query|contains:
          - 'onerror='
      cs-uri-query|contains:
          - 'javascript:'
  condition: cs-uri AND cs-uri-query
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse