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Fencer Vulns
critical 9.8

CVE-2018-1000861 kev in the critical feed json

Deserialization of Untrusted Data in Jenkins

published 2018-12-10 7 y ago modified 2026-06-17 4 mo ago also GHSA-hhpm-5cp2-hg4x , EUVD-2022-4161

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-02-10
epss
98.3%
EPSS 98.3% chance of exploitation in 30 days, percentile 99.9%
public exploits
1
Metasploit, plus a Nuclei check

Summary

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • maven org.jenkins-ci.main:jenkins-core 2.138.4, 2.154
  • jenkins openshift 3.11 2.138.4.1544416383-1.el7

red hat advisories RHBA-2019:0024

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-2018-1000861 updated cvss 8.8

jenkins: code execution through crafted URLs (SECURITY-595)

  • Red Hat OpenShift Container Platform 3.2 jenkins Red Hat OpenShift Container Platform 3.3 jenkins Red Hat OpenShift Container Platform 3.4 jenkins Red Hat OpenShift Container Platform 3.5 jenkins Red Hat OpenShift Container Platform 3.6 jenkins Red Hat OpenShift Container Platform 3.7 jenkins
    +2 more products
    Red Hat OpenShift Container Platform 3.9 jenkins Red Hat OpenShift Container Platform 3.10 jenkins
    affected: no fix available
  • Red Hat OpenShift Container Platform 3.11 jenkins 2.138.4.1544416383-1.el7
    fixed: vendor fix RHBA-2019:0024
  • Red Hat OpenShift Container Platform 3.11 python-elasticsearch 5.4.0-1.el7, ansible-service-broker 1.3.21-1.el7, automation-broker-apb-role 1.3.21-1.el7, prometheus 3.11.59-1.git.5023.748e6f7.el7, ansible-service-broker-selinux 1.3.21-1.el7, atomic-openshift 3.11.59-1.git.0.7cb6277.el7, +34 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

Timeline

  1. Published
  2. First public exploit (Metasploit exploit/multi/http/jenkins_metaprogramming)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-08-10 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Jenkins, Jenkins Stapler Web Framework
CISA name
Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

98.33% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C
GitHub 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H

Affected packages

ecosystem package affected fixed in
maven org.jenkins-ci.main:jenkins-core
<2.138.4
>=2.140, <2.154
2.138.4
2.154

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data
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.