CVE-2026-7509 — Cross-Site Scripting (XSS)

title: CVE-2026-7509 - KIA Subtitle Plugin Stored XSS via Shortcode Attributes
id: scw-2026-05-22-ai-1
status: experimental
level: medium
description: |
  Detects the exploitation of CVE-2026-7509 in the KIA Subtitle WordPress plugin. This rule looks for web requests containing the plugin's path and the 'the-subtitle' shortcode with 'before' or 'after' attributes, specifically targeting potential XSS payloads containing '<script>' tags. This indicates an attempt to inject malicious scripts into pages via the vulnerable shortcode.
author: SCW Feed Engine (AI-generated)
date: 2026-05-22
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7509/
tags:
  - attack.initial_access
  - attack.t1189
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/wp-content/plugins/kia-subtitle/'
      cs-uri-query|contains:
          - 'the-subtitle'
      cs-uri-query|contains:
          - 'before=' 
      cs-uri-query|contains:
          - 'after='
  selection_script_injection:
      cs-uri-query|contains:
          - '<script>'
      condition: selection AND selection_script_injection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse