diff --git a/cves/2019/CVE-2019-12583.yaml b/cves/2019/CVE-2019-12583.yaml
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+id: CVE-2019-12583
+
+info:
+  name: Zyxel ZyWall UAG/USG - Missing ACL Guest Account Generator
+  author: n-thumann
+  severity: critical
+  description: Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.
+  reference:
+    - https://nvd.nist.gov/vuln/detail/CVE-2019-12583
+    - https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
+    - 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:N/S:U/C:N/I:H/A:H
+    cvss-score: 9.1
+    cve-id: CVE-2019-12583
+    cwe-id: CWE-425
+  tags: cve,cve2019,zyxel,zywall
+
+
+requests:
+  - method: GET
+    path:
+      - "{{BaseURL}}"
+      - "{{BaseURL}}/free_time.cgi"
+
+    req-condition: true
+    matchers-condition: and
+    matchers:
+      - type: dsl
+        dsl:
+          - "contains(body_1, 'zyFunction.js')"
+          - "!contains(body_1, '/free_time_transaction.cgi')"
+          - "!contains(body_2, '/free_time_failed.cgi?err_msg=The Free Time feature is disabled at this time.')"
+        condition: and
+
+      - type: status
+        status:
+          - 200