CVE-2011-4350

MEDIUM

Yaws 1.91 - Authenticated Path Traversal via URL Request

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-4350. PoCs published by sinn3r, including Metasploit module auxiliary/scanner/http/yaws_traversal.

AI-analyzed exploit summary This Metasploit module exploits a directory traversal vulnerability in Yaws web server (v1.9.1 or less) to retrieve arbitrary files. It sends a crafted GET request with traversal sequences to access files outside the web root.

Description

Yaws 1.91 has a directory traversal vulnerability in the way certain URLs are processed. A remote authenticated user could use this flaw to obtain content of arbitrary local files via specially-crafted URL request.

Exploits (1)

metasploit WORKING POC
by sinn3r · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/http/yaws_traversal.rb

This Metasploit module exploits a directory traversal vulnerability in Yaws web server (v1.9.1 or less) to retrieve arbitrary files. It sends a crafted GET request with traversal sequences to access files outside the web root.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Yaws web server <= v1.9.1
No auth needed
Prerequisites: Network access to the Yaws web server · Knowledge of the target file path
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Third Party Advisory x_refsource_misc
https://security-tracker.debian.org/tracker/CVE-2011-4350
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-4350
Third Party Advisory x_refsource_misc
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650009
Mailing List, Third Party Advisory x_refsource_misc
https://www.openwall.com/lists/oss-security/2011/11/25/7

Scores

CVSS v3 6.5
EPSS 0.1614
EPSS Percentile 96.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-22
Status published
Products (4)
debian/debian_linux 8.0
debian/debian_linux 9.0
debian/debian_linux 10.0
yaws/yaws 1.91
Published Nov 26, 2019
Tracked Since Feb 18, 2026