CVE-2021-21681

Docker credential disclosure via plaintext configuration storage

Published Aug 31, 2021 · Updated Aug 3, 2024

Plaintext credential storage in Jenkins Nomad Plugin 0.7.4 and earlier allows local users to read Docker registry passwords. The worker-template configuration writes Docker authentication passwords directly into the controller's global config.xml file without encryption. The user must already have access to the Jenkins controller file system, and the exposure is limited to confidentiality of configured Docker credentials.

CVSS severity5.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Plaintext credential storage in Jenkins Nomad Plugin 0.7.4 and earlier allows local users to read Docker registry passwords. The worker-template configuration writes Docker authentication passwords directly into the controller's global config.xml file without encryption. The user must already have access to the Jenkins controller file system, and the exposure is limited to confidentiality of configured Docker credentials.

The record

CVE
CVE-2021-21681
Published
Aug 31, 2021
Updated
Aug 3, 2024
Vendor
Jenkins Project
Product
Jenkins Nomad Plugin
Classifications
CWE-256, CWE-522, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 <=0.7.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Jenkins Project · Jenkins Nomad Pluginversion=unspecified <=0.7.4

Published CVSS scores

5.5GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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.

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-256Plaintext Storage of a Password
CWE-522Insufficiently Protected Credentials
T1552.001Credentials In Files

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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