CVE-2021-21626 Missing permission checks in Jenkins Warnings Next Generation Plugin allow listing workspace contents

What is CVE-2021-21626?

CVE-2021-21626 is a medium-severity missing authorization vulnerability in Jenkins Warnings Next Generation Plugin, published on 18 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Jenkins Warnings Next Generation Plugin 8.4.4 and earlier does not perform a permission check in methods implementing form validation, allowing attackers with Item/Read permission but without Item/Workspace or Item/Configure permission to check whether attacker-specified file patterns match workspace contents.

Weakness: CWE-862

Which versions are affected by CVE-2021-21626?

2 open source packages ship an affected version, including io.jenkins.plugins:warnings-ng. It affects 1 product.

Products include Jenkins Warnings Next Generation.

How do I fix CVE-2021-21626?

Upgrade io.jenkins.plugins:warnings-ng to 8.5.0 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-21626 being exploited?

There is no known exploitation of CVE-2021-21626 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Warnings Next Generation Plugin

• CVE-2019-1003008 Jenkins Warnings Next Generation Plugin cross-site request forgery vulnerability High 8.8
• CVE-2022-23107 Path Traversal in Jenkins Warnings Next Generation Plugin High 8.1
• CVE-2019-1003023 XSS vulnerability in Jenkins Warnings Next Generation Plugin Medium 6.1
• CVE-2019-10325 Jenkins Warnings NG Plugin Cross-site scripting vulnerability Medium 5.4
• CVE-2019-10326 Jenkins Warnings NG Plugin cross-site request forgery vulnerability Medium 4.3

Sources

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

Also known as GHSA-7j3x-xm4j-jfj7.