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Fencer Vulns
medium 4.3

CVE-2023-43494 json

Jenkins does not exclude sensitive build variables from search

published 2023-09-20 3 y ago modified 2026-09-08 2 mo ago also BIT-jenkins-2023-43494 , EUVD-2023-2391 , GHSA-279f-qwgh-h5mp

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

Jenkins 2.50 through 2.423 (both inclusive), LTS 2.60.1 through 2.414.1 (both inclusive) does not exclude sensitive build variables (e.g., password parameter values) from the search in the build history widget, allowing attackers with Item/Read permission to obtain values of sensitive variables used in builds by iteratively testing different characters until the correct sequence is discovered.

Patch / fix

  • maven org.jenkins-ci.main:jenkins-core 2.414.2, 2.424
  • bitnami jenkins 2.424.0
  • Jenkins Project Jenkins 2.424

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-43494 updated cvss 4.3

jenkins: Builds can be filtered by values of sensitive build variables

  • Red Hat OpenShift Developer Tools and Services jenkins
    affected: no fix available
  • Red Hat OpenShift Container Platform 3.11 jenkins
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 jenkins
    affected: no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

3.94% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
>=2.50, <2.414.2
>=2.415, <2.424
2.414.2
2.424
bitnami jenkins
>=2.50.0, <2.424.0
2.424.0

Affected products

  • Jenkins Project Jenkins

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.