CVE-2020-2226 Stored XSS vulnerability in Jenkins Matrix Authorization Strategy Plugin

What is CVE-2020-2226?

CVE-2020-2226 is a medium-severity cross-site scripting vulnerability in Jenkins Matrix Authorization Strategy Plugin, published on 15 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Jenkins Matrix Authorization Strategy Plugin 2.6.1 and earlier does not escape user names shown in the configuration, resulting in a stored cross-site scripting vulnerability.

Weakness: CWE-79

Which versions are affected by CVE-2020-2226?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:matrix-auth. It affects 1 product.

Products include Jenkins Matrix Authorization Strategy.

How do I fix CVE-2020-2226?

Upgrade org.jenkins-ci.plugins:matrix-auth to 2.6.2 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-2020-2226 being exploited?

There is no known exploitation of CVE-2020-2226 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Matrix Authorization Strategy Plugin

• CVE-2026-42521 Jenkins Matrix Authorization Strategy Plugin: Unsafe deserialization allows invocation of parameterless constructors Medium 6.5
• CVE-2021-21623 Incorrect permission checks in Jenkins Matrix Authorization Strategy Plugin may allow accessing some items Medium 6.5

Sources

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

Also known as GHSA-vr6v-wjfw-rxcr.