Vulnerability Description
Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Jenkins | Jenkins | <= 2.277.1 |
References
- http://www.openwall.com/lists/oss-security/2021/04/07/2Mailing ListThird Party Advisory
- https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/04/07/2Mailing ListThird Party Advisory
- https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721Vendor Advisory
FAQ
What is CVE-2021-21639?
CVE-2021-21639 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers wit...
How severe is CVE-2021-21639?
CVE-2021-21639 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21639?
Check the references section above for vendor advisories and patch information. Affected products include: Jenkins Jenkins.