CVE-2021-21626Network attack vector

Workspace listing via unchecked form validation

Published Mar 18, 2021 · Updated Aug 3, 2024

Missing authorization in Jenkins Warnings Next Generation Plugin 8.4.4 and earlier allows remote authenticated users to list workspace contents. Form-validation methods accept attacker-controlled file patterns and test them against workspace contents without checking Item/Workspace or Item/Configure permission. Item/Read access is sufficient, and repeated pattern queries disclose workspace names and paths without permitting file modification.

CVSS severity4.3
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Jenkins Warnings Next Generation Plugin 8.4.4 and earlier allows remote authenticated users to list workspace contents. Form-validation methods accept attacker-controlled file patterns and test them against workspace contents without checking Item/Workspace or Item/Configure permission. Item/Read access is sufficient, and repeated pattern queries disclose workspace names and paths without permitting file modification.

The record

CVE
CVE-2021-21626
Published
Mar 18, 2021
Updated
Aug 3, 2024
Vendor
Jenkins Project
Product
Jenkins Warnings Next Generation Plugin
Classifications
CWE-862, T1083
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 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 <=8.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Jenkins Warnings Next Generation Pluginversion=unspecified <=8.4.4

Published CVSS scores

4.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:S/C:N/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 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-862Missing Authorization
T1083File and Directory Discovery

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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