Strix
26.1K

CVE-2021-21639

MEDIUMCVSS 4.3/10EPSS 2.73%

Last modified

CVE-2021-21639 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 2.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

EPSS Probability
2.73%

84.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
JenkinsJenkins<= 2.277.1
JenkinsJenkins<= 2.286

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21639?
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.
How severe is CVE-2021-21639?
CVE-2021-21639 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 2.73% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21639?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21639?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST