CVE-2020-2146Network attack vector

Connection interception via unvalidated SSH host keys

Published Mar 9, 2020 · Updated Aug 4, 2024

Missing SSH host-key validation in Jenkins Mac Plugin 1.1.0 and earlier allows man-in-the-middle attackers to intercept agent connections. The plugin's SSH connection setup accepts the presented server identity without validating its host key against a trusted value. An attacker positioned between the Jenkins controller and a configured Mac Cloud host can impersonate the agent endpoint and intercept connection traffic.

CVSS severity7.4
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing SSH host-key validation in Jenkins Mac Plugin 1.1.0 and earlier allows man-in-the-middle attackers to intercept agent connections. The plugin's SSH connection setup accepts the presented server identity without validating its host key against a trusted value. An attacker positioned between the Jenkins controller and a configured Mac Cloud host can impersonate the agent endpoint and intercept connection traffic.

The record

CVE
CVE-2020-2146
Published
Mar 9, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
Jenkins Mac Plugin
Classifications
CWE-347, T1557
Attack vector
network
Privileges
unauthenticated

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 <=1.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jenkins Project · Jenkins Mac Pluginversion=unspecified <=1.1.0

Published CVSS scores

7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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