CVE-2026-7429 — The STL Processing Endpoint That Cross-Site Scripting (XSS)

title: Reflected XSS via STL Processing Endpoint — CVE-2026-7429
id: scw-2026-04-30-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit the reflected XSS vulnerability in the SSCMS v7.4.0 STL processing endpoint. The rule looks for requests to '/api/stl/actions/dynamic' containing common XSS payload indicators within the query string, which are indicative of an attempt to inject malicious JavaScript.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7429/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri: 
          - '/api/stl/actions/dynamic'
      cs-uri-query|contains:
          - '<script>'
          - 'alert('
          - 'onerror='
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse