CVE-2022-34305 XSS in examples web application

What is CVE-2022-34305?

CVE-2022-34305 is a medium-severity cross-site scripting vulnerability in Apache Tomcat, published on 23 Jun 2022. 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

In Apache Tomcat 10.1.0-M1 to 10.1.0-M16, 10.0.0-M1 to 10.0.22, 9.0.30 to 9.0.64 and 8.5.50 to 8.5.81 the Form authentication example in the examples web application displayed user provided data without filtering, exposing a XSS vulnerability.

Weakness: CWE-79

Which versions are affected by CVE-2022-34305?

9 open source packages ship an affected version, including org.apache.tomcat:tomcat and tomcat. It affects 1 product.

Products include Apache Tomcat.

How do I fix CVE-2022-34305?

Upgrade org.apache.tomcat:tomcat to a fixed version for your release line: 10.0.22, 10.1.0-M17, 8.5.82 or 9.0.65.

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-2022-34305 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-34305 exists.

Public exploit code: 1 Nuclei template.

Other vulnerabilities in Apache Tomcat

• CVE-2025-24813 Apache Tomcat Path Equivalence Exploited Critical 10.0
• CVE-2016-8735 Apache Tomcat Remote Code Execution Exploited Critical 9.8
• CVE-2017-12617 Apache Tomcat Remote Code Execution Exploited High 8.1
• CVE-2017-12615 Apache Tomcat on Windows Remote Code Execution Exploited High 8.1
• CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Exploited High 7.5

All Apache Tomcat vulnerabilities

Sources

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

Also known as BIT-tomcat-2022-34305, CLEANSTART-2026-EU30316, CLSA-2026-1787564106, DEBIAN-CVE-2022-34305, GHSA-6j88-6whg-x687, UBUNTU-CVE-2022-34305.