CVE-2020-2189Network attack vector

Remote code execution via unsafe YAML deserialization

Published May 6, 2020 · Updated Aug 4, 2024

Unsafe YAML deserialization in Jenkins SCM Filter Jervis Plugin 0.2.1 and earlier allows remote authenticated users to execute code. JervisFilterTrait passes repository-controlled yamlText to SnakeYAML through new Yaml().load(), permitting arbitrary Java type construction. Exploitation requires permission to configure a filtered job or control of a configured repository, and successful execution runs code on the Jenkins controller.

CVSS severity8.8
High
EPSS probability2.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe YAML deserialization in Jenkins SCM Filter Jervis Plugin 0.2.1 and earlier allows remote authenticated users to execute code. JervisFilterTrait passes repository-controlled yamlText to SnakeYAML through new Yaml().load(), permitting arbitrary Java type construction. Exploitation requires permission to configure a filtered job or control of a configured repository, and successful execution runs code on the Jenkins controller.

The record

CVE
CVE-2020-2189
Published
May 6, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
SCM Filter Jervis
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · SCM Filter Jervisversion=unspecified <=0.2.1

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8GitHub Advisory DatabaseCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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