CVE-2025-10503 — Cross-Site Scripting (XSS)

title: CVE-2025-10503 - Reflected XSS via Authentication Endpoint
id: scw-2026-04-29-ai-1
status: experimental
level: medium
description: |
  Detects attempts to exploit CVE-2025-10503 by looking for common XSS payload patterns within the query string of requests targeting the '/auth' endpoint. This indicates a potential reflected XSS attack where malicious JavaScript is injected and reflected back to the user's browser.
author: SCW Feed Engine (AI-generated)
date: 2026-04-29
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2025-10503/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri-query|contains:
          - '<script>alert('CVE-2025-10503')</script>'
          - 'javascript:alert(document.cookie)'
      cs-uri|contains:
          - '/auth'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse