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[ CVE-2018-1000861 · Published 10 Dec 2018 ]

Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

Exploited · CISA KEV CVSS 9.8 EPSS 98%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-02-10
  • EPSS: 98% chance of exploitation in the next 30 days (higher than 100% of CVEs)
  • Critical severity: CVSS 9.8

[ Description ]Official 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.

CISA: A code execution vulnerability exists in the Stapler web framework used by Jenkins

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 10 Aug 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References