CVE-2011-4350 Path traversal in yaws

What is CVE-2011-4350?

CVE-2011-4350 is a medium-severity path traversal vulnerability in Debian Debian Linux, published on 26 Nov 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-22

Which versions are affected by CVE-2011-4350?

It affects 2 products.

Products include Debian Debian Linux, Yaws Yaws.

How do I fix CVE-2011-4350?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2011-4350 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-4350 exists.

Public exploit code: 1 Metasploit module.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-4350, GHSA-8xpm-277g-mcr3.