CVE-2020-2256 Stored XSS vulnerability in Pipeline Maven Integration Plugin via unescaped display name

Medium 5.4 Published 16 Sep 2020 Updated 4 Aug 2024

Stored XSS in Jenkins Maven plugin allows attackers with Job/Configure permission to execute scripts via upstream job display names.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2020-2256?

CVE-2020-2256 is a medium-severity cross-site scripting vulnerability in Jenkins Pipeline Maven Integration Plugin, published on 16 Sep 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 Pipeline Maven Integration Plugin 3.9.2 and earlier does not escape the upstream job's display name shown as part of a build cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Job/Configure permission.

Weakness: CWE-79

Which versions are affected by CVE-2020-2256?

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

Package	Affected	Fixed in
`org.jenkins-ci.plugins:pipeline-maven` Maven	All versions	`3.9.3`
`org.jenkins-ci.plugins:pipeline-maven` Maven	All versions	`3.9.3`

Products include Jenkins Pipeline Maven Integration.

How do I fix CVE-2020-2256?

Upgrade org.jenkins-ci.plugins:pipeline-maven to 3.9.3 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-2020-2256 being exploited?

There is no known exploitation of CVE-2020-2256 in the wild and no public exploit code.

Sources

Also known as GHSA-hq2h-9mc3-h6w2.