CVE-2020-2134Network attack vector

Controller code execution via unintercepted constructors

Published Mar 9, 2020 · Updated Aug 4, 2024

Sandbox bypass in Jenkins Script Security Plugin 1.70 and earlier allows remote authenticated users to execute code in the controller JVM. Constructor handling permits crafted super-constructor calls and bodies to execute without interception by the Groovy sandbox. The attacker must have permission to specify and run sandboxed scripts, after which arbitrary controller-context code execution is available.

CVSS severity8.8
High
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox bypass in Jenkins Script Security Plugin 1.70 and earlier allows remote authenticated users to execute code in the controller JVM. Constructor handling permits crafted super-constructor calls and bodies to execute without interception by the Groovy sandbox. The attacker must have permission to specify and run sandboxed scripts, after which arbitrary controller-context code execution is available.

The record

CVE
CVE-2020-2134
Published
Mar 9, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
Jenkins Script Security Plugin
Classifications
CWE-863, T1211
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 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 <=1.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Jenkins Script Security Pluginversion=unspecified <=1.70

Published CVSS scores

8.8GitLab Advisory DatabaseCVSS:3.1/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.

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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-863Incorrect Authorization
T1211Exploitation for Defense Evasion

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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