Affected versions of sencisho are vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the URL.

Example request:

GET /../../../../../../../../../../etc/passwd HTTP/1.1
host:foo

Recommendation

No patch is available for this vulnerability.

It is recommended that the package is only used for local development, and if the functionality is needed for production, a different package is used instead.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-16092
• https://github.com/JacksonGL/NPM-Vuln-PoC/tree/master/directory-traversal/sencisho
• GHSA-6866-x7cf-rmh5
• https://www.npmjs.com/advisories/340