CVE-2026-41467 — Cross-Site Scripting (XSS)

title: ProjeQtor Stored XSS via checkValidFileName() - CVE-2026-41467
id: scw-2026-04-27-ai-1
status: experimental
level: high
description: |
  Detects the initial upload of malicious HTML files to ProjeQtor via the file upload endpoint. This is specific to CVE-2026-41467 where the checkValidFileName() function fails to restrict HTML file uploads, allowing attackers to inject JavaScript that will execute when other users access the file.
author: SCW Feed Engine (AI-generated)
date: 2026-04-27
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-41467/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      uri|contains:
          - '/upload'
      cs-method|contains:
          - 'POST'
      cs-uri-query|contains:
          - '.html'
      sc-status|contains:
          - '200'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse