CVE-2025-27095Public exploitNetwork attack vector

Kubernetes token disclosure via kubeconfig server redirection

Published Mar 31, 2025 · Updated Mar 31, 2025

Kubernetes token disclosure in JumpServer before 3.10.18 and 4.0.0 through 4.7 allows remote authenticated users to capture cluster tokens. The Kubernetes session passes a user-edited kubeconfig server address to kubectl, which sends the bearer token to the substituted endpoint. A low-privileged account with Kubernetes-session access is sufficient, and the captured token grants the cluster access permitted by that credential.

CVSS severity4.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kubernetes token disclosure in JumpServer before 3.10.18 and 4.0.0 through 4.7 allows remote authenticated users to capture cluster tokens. The Kubernetes session passes a user-edited kubeconfig server address to kubectl, which sends the bearer token to the substituted endpoint. A low-privileged account with Kubernetes-session access is sufficient, and the captured token grants the cluster access permitted by that credential.

The record

CVE
CVE-2025-27095
Published
Mar 31, 2025
Updated
Mar 31, 2025
Vendor
JumpServer
Product
JumpServer
Classifications
CWE-266, T1528
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2025Record 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=< 3.10.18
  2. Affected versionversion=>= 4.0.0, < 4.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JumpServer · JumpServerversion=< 3.10.18; version=>= 4.0.0, < 4.8.0

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
T1528Steal Application Access Token

Public exploit references

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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