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CVE-2018-1000861

9.8 · CRITICALActively Exploited

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 a…

Published Dec 10, 2018CWE-502EPSS 98.33%

Overview

CVE-2018-1000861 is a critical-severity vulnerability. It was published on December 10, 2018 and has a CVSS 3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.htmlRefwww.securityfocus.com/bid/106176Refaccess.redhat.com/errata/RHBA-2019:0024Refjenkins.io/security/advisory/2018-12-05/#SECURITY-595Refpacketstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.htmlRefwww.securityfocus.com/bid/106176Refaccess.redhat.com/errata/RHBA-2019:0024Refjenkins.io/security/advisory/2018-12-05/#SECURITY-595CISAwww.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-1000861

How CyberStrike helps

Frequently asked questions

What is CVE-2018-1000861?

CVE-2018-1000861 is a critical-severity vulnerability. It was published on December 10, 2018 and has a CVSS 3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2018-1000861?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-1000861?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-1000861?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-1000861 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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