CVE-2016-4561 Cross-site scripting in n/a

What is CVE-2016-4561?

CVE-2016-4561 is a medium-severity cross-site scripting vulnerability in Debian Debian Linux, published on 10 May 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site scripting (XSS) vulnerability in the cgierror function in CGI.pm in ikiwiki before 3.20160506 might allow remote attackers to inject arbitrary web script or HTML via unspecified vectors involving an error message.

Weakness: CWE-79

Which versions are affected by CVE-2016-4561?

It affects 2 products.

Products include Debian Debian Linux, Ikiwiki Ikiwiki.

How do I fix CVE-2016-4561?

Upgrade to a fixed version.

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-2016-4561 being exploited?

There is no known exploitation of CVE-2016-4561 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-2016-4561, DLA-463-1, DSA-3571-1, GHSA-vxg6-rr45-x5cv, UBUNTU-CVE-2016-4561.