CVE-2021-21639

mediumpriority · track · 18EPSS 0.027 · 86 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.73% (86th) EPSS

CVSS 4 · medium

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

affected products (7)

Products and version ranges known to be affected.

Jenkins Project Jenkins≤ unspecified ≤2.286enisa_euvdEU
Jenkins Project Jenkins≤ unspecified ≤LTS 2.277.1enisa_euvdEU
jenkins jenkins≤ 2.286nvdUScpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:*
jenkins jenkins≤ 2.277.1nvdUScpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:*
Bitnami jenkins< 2.286.1osvUSpkg:bitnami/jenkins
Maven org.jenkins-ci.main:jenkins-core< 2.277.2osvUSpkg:maven/org.jenkins-ci.main/jenkins-core
Maven org.jenkins-ci.main:jenkins-core2.278 → 2.287osvUSpkg:maven/org.jenkins-ci.main/jenkins-core

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-pvwx-3jx5-24r2Lack of type validation in agent related REST API in Jenkins2022-05-24ghsa · osvUS
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. This allows attackers with Computer/Configure permission to replace a node with one of a different type. Jenkins 2.287, LTS 2.277.2 validates the type of object created and rejects objects of unexpected types.
BIT-jenkins-2021-216392024-03-06vendor · osvUS
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.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2021-04-07modified 2026-06-17

references (22)

External citations — patches, advisories, analysis.

scry

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