CVE-2018-16468 Loofah Cross-site Scripting vulnerability

What is CVE-2018-16468?

CVE-2018-16468 is a medium-severity cross-site scripting vulnerability in Debian Debian Linux, published on 30 Oct 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

In the Loofah gem for Ruby, through v2.2.2, unsanitized JavaScript may occur in sanitized output when a crafted SVG element is republished.

Weakness: CWE-79

Which versions are affected by CVE-2018-16468?

2 open source packages ship an affected version, including loofah. It affects 2 products.

Products include Debian Debian Linux, Loofah Project Loofah.

How do I fix CVE-2018-16468?

Upgrade loofah to 2.2.3 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-16468 being exploited?

There is no known exploitation of CVE-2018-16468 in the wild and no public exploit code.

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-2018-16468, DSA-4364-1, GHSA-g4xq-jx4w-4cjv, SUSE-SU-2018:3928-1, UBUNTU-CVE-2018-16468.