4.3

CVE-2021-21639: jenkins project jenkins

Modified
AliasesGHSA-pvwx-3jx5-24r2BIT-jenkins-2021-21639ALPINE-CVE-2021-21639
Published 07-04-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-21639 is a medium (CVSS 4.3) vulnerability in jenkins project jenkins. EPSS estimates a 2.73% chance of exploitation in the next 30 days, higher than 86% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (NVD)
EPSS score
2.73%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2021:1551RHSA-2021:2437

Timeline

  1. 07-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.73%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.73% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • jenkins< 2.287-r0
Jenkins1 product
Jenkins project1 product
  • jenkins≥ unspecified, ≤ 2.286 | ≥ unspecified, ≤ LTS 2.277.1
Org.jenkins-ci.main1 product
  • jenkins-core< 2.277.2 | ≥ 2.278, < 2.287

4 vendors · 4 products

References

6 links