Medium severity · published Apr 7, 2021
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,…
4.3
CVSS
2.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JE
Jenkins · Jenkins
through 2.277.1; through 2.286 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21639
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21639
Mailing List
http://www.openwall.com/lists/oss-security/2021/04/07/2
Vendor Advisory
https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721
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