CVE-2025-23047Network attack vector

Cluster metadata disclosure via wildcard CORS policy

Published Jan 22, 2025 · Updated Feb 12, 2025

Information disclosure in affected Cilium releases allows remote attackers to read Kubernetes cluster metadata through Hubble UI. The generated NGINX configuration sets Access-Control-Allow-Origin to a wildcard on Hubble UI API responses, permitting a malicious origin to read node names, IP addresses, workload metadata, and network configuration. Exploitation requires an accessible Hubble UI deployment and a victim who visits an attacker-controlled page.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Cilium releases allows remote attackers to read Kubernetes cluster metadata through Hubble UI. The generated NGINX configuration sets Access-Control-Allow-Origin to a wildcard on Hubble UI API responses, permitting a malicious origin to read node names, IP addresses, workload metadata, and network configuration. Exploitation requires an accessible Hubble UI deployment and a victim who visits an attacker-controlled page.

The record

CVE
CVE-2025-23047
Published
Jan 22, 2025
Updated
Feb 12, 2025
Vendor
Cilium
Product
Cilium
Classifications
CWE-200, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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=>= 1.14.0, < 1.14.18
  2. Affected versionversion=>= 1.15.0, < 1.15.12
  3. Affected versionversion=>= 1.16.0, < 1.16.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cilium · Ciliumversion=>= 1.14.0, < 1.14.18; version=>= 1.15.0, < 1.15.12; version=>= 1.16.0, < 1.16.5

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1189Drive-by Compromise

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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