CVE-2018-1000550 Path traversal in n/a

What is CVE-2018-1000550?

CVE-2018-1000550 is a critical path traversal vulnerability in Debian Debian Linux, published on 26 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Sympa Community Sympa version prior to version 6.2.32 contains a Directory Traversal vulnerability in wwsympa.fcgi template editing function that can result in Possibility to create or modify files on the server filesystem. This attack appear to be exploitable via HTTP GET/POST request. This vulnerability appears to have been fixed in 6.2.32.

Weakness: CWE-22

Which versions are affected by CVE-2018-1000550?

It affects 2 products.

Products include Debian Debian Linux, Sympa Sympa.

How do I fix CVE-2018-1000550?

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-2018-1000550 being exploited?

There is no known exploitation of CVE-2018-1000550 in the wild and no public exploit code.

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• 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-2018-1000550, DLA-1441-1, DSA-4285-1, GHSA-4fwc-r99f-85f4, MGASA-2019-0263, UBUNTU-CVE-2018-1000550.