CVE-2021-21639

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.

4.3

CVSS

Severity: Medium

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.14%

Vendor Advisory jenkins.io

Affected: Jenkins project Jenkins

References

Link	Tags
https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721	vendor advisory
http://www.openwall.com/lists/oss-security/2021/04/07/2	third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-21639?: CVE-2021-21639 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21639?: To fix CVE-2021-21639, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21639 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-21639 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21639?: CVE-2021-21639 affects Jenkins project Jenkins.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.