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Fencer Vulns
medium 4.4

CVE-2023-27903 json

Incorrect Authorization in Jenkins Core

published 2023-03-08 3 y ago modified 2026-09-08 2 mo ago also BIT-jenkins-2023-27903 , EUVD-2023-0879 , GHSA-584m-7r4m-8j6v

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

Jenkins 2.393 and earlier, LTS 2.375.3 and earlier creates a temporary file in the default temporary directory with the default permissions for newly created files when uploading a file parameter through the CLI, potentially allowing attackers with access to the Jenkins controller file system to read and write the file before it is used.

Patch / fix

  • maven org.jenkins-ci.main:jenkins-core 2.375.4, 2.387.1, 2.394
  • bitnami jenkins 2.394.0
  • Jenkins Project Jenkins 2.394
  • jenkins ocp tools 4.12 2.414.3.1698293911-3.el8
  • jenkins-2-plugins ocp tools 4.12 4.12.1698294000-1.el8
  • jenkins ocp tools 4.11 2.414.3.1698298955-3.el8
  • jenkins-2-plugins ocp tools 4.11 4.11.1698299029-1.el8
  • jenkins ocp tools 4.11 2.401.1.1686831596-3.el8
  • jenkins-2-plugins ocp tools 4.11 4.11.1686831822-1.el8
  • jenkins ocp tools 4.11 2.387.1.1683009763-3.el8
  • jenkins-2-plugins ocp tools 4.11 4.11.1683009941-1.el8

red hat advisories RHSA-2023:6172RHSA-2023:6171RHSA-2023:3663RHSA-2023:3198RHSA-2024:0775RHSA-2024:0778

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-2023-27903 updated cvss 4.4

Jenkins: Temporary file parameter created with insecure permissions

  • Red Hat OpenShift Container Platform 3.11 jenkins
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Developer Tools and Services for OCP 4.11 for RHEL 8 jenkins 2.387.1.1683009763-3.el8, jenkins 2.401.1.1686831596-3.el8, jenkins 2.414.3.1698298955-3.el8, jenkins 2.426.3.1706516929-3.el8
    fixed: vendor fix RHSA-2023:3198
  • Red Hat OpenShift Developer Tools and Services for OCP 4.12 jenkins 2.387.1.1683009767-3.el8, jenkins 2.414.3.1698293911-3.el8, jenkins 2.426.3.1706515686-3.el8
    fixed: vendor fix RHSA-2023:3195
  • Red Hat OpenShift Developer Tools and Services for OCP 4.13 jenkins 2.401.1.1686680404-3.el8
    fixed: vendor fix RHSA-2023:3622
  • Red Hat OpenShift Container Platform 4.10 jenkins 2.387.1.1680701869-1.el8
    fixed: vendor fix RHSA-2023:1655
  • Red Hat OpenShift Developer Tools and Services for OCP 4.11 for RHEL 8 jenkins-2-plugins 4.11.1683009941-1.el8, jenkins-2-plugins 4.11.1686831822-1.el8, jenkins-2-plugins 4.11.1698299029-1.el8, jenkins-2-plugins 4.11.1706516946-1.el8 Red Hat OpenShift Developer Tools and Services for OCP 4.12 jenkins-2-plugins 4.12.1683009955-1.el8, jenkins-2-plugins 4.12.1698294000-1.el8, jenkins-2-plugins 4.12.1706515741-1.el8 Red Hat OpenShift Developer Tools and Services for OCP 4.13 jenkins-2-plugins 4.13.1686680473-1.el8 Red Hat OpenShift Container Platform 4.10 haproxy 2.2.19-4.el8, haproxy22 2.2.19-4.el8, perf 4.18.0-305.85.1.el8_4, kernel 4.18.0-305.85.1.el8_4, bpftool 4.18.0-305.85.1.el8_4, toolbox 0.0.9-1.rhaos4.10.el8, +46 more
    not affected: vulnerable code not present

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
20 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub 3.1 3.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
>=2.376, <2.387.1
<2.375.4
>=2.388, <2.394
2.387.1
2.375.4
2.394
bitnami jenkins
<2.394.0
2.394.0

Affected products

  • Jenkins Project Jenkins

Classification

Weakness
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.