> CVE-2025-23047 [MEDIUM]

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PUBLISHED
2025-01-22 18:15
MODIFIED
2025-09-03 17:17
CVSS_SCORE V3
6.5
EPSS (Prob. Exploit)
0.50%
Top 58.1%
DATA SOURCES:
NVD 🔗 2025-10-18 CVE PROJECT 🔗 2026-01-19 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-04 OSV 🔗 2026-03-01

> DESCRIPTION

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An insecure default `Access-Control-Allow-Origin` header value could lead to sensitive data exposure for users of Cilium versions 1.14.0 through 1.14.7, 1.15.0 through 1.15.11, and 1.16.0 through 1.16.4 who deploy Hubble UI using either Cilium CLI or via the Cilium Helm chart. A user with access to a Hubble UI instance affected by this issue could leak configuration details about the Kubernetes cluster which Hubble UI is monitoring, including node names, IP addresses, and other metadata about workloads and the cluster networking configuration. In order for this vulnerability to be exploited, a victim would have to first visit a malicious page. This issue is fixed in Cilium v1.14.18, v1.15.12, and v1.16.5. As a workaround, users who deploy Hubble UI using the Cilium Helm chart directly can remove the CORS headers from the Helm template as shown in the patch from commit a3489f190ba6e87b5336ee685fb6c80b1270d06d.

> AFFECTED_PRODUCTS

Cilium - Cilium
>= 1.14.0 < 1.14.19
Cilium - Cilium
>= 1.15.0 < 1.15.13
Cilium - Cilium
>= 1.16.0 < 1.16.6

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> GITHUB SECURITY ADVISORY

GHSA-h78m-j95m-5356 MODERATE

Cilium has an information leakage via insecure default Hubble UI CORS header

AFFECTED PACKAGES:
GO / github.com/cilium/cilium
>= 1.16.0, < 1.16.6
Fixed in: 1.16.6
GO / github.com/cilium/cilium
>= 1.15.0, < 1.15.13
Fixed in: 1.15.13
GO / github.com/cilium/cilium
>= 1.14.0, < 1.14.19
Fixed in: 1.14.19

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Cilium vulnerable to information leakage via insecure default Hubble UI CORS header

AFFECTED PACKAGES:
Unknown / Unknown
70 versions affected
ALIASES:
BIT-cilium-2025-23047, BIT-cilium-operator-2025-23047, BIT-hubble-relay-2025-23047, GHSA-h78m-j95m-5356, GO-2025-3416

> HISTORIQUE DES MODIFICATIONS

Première apparition
22/01/2025 18:15
Source: NVD
📊 ENRICHISSEMENT 18/10/2025 15:00
CVEPROJECT
Champ modifié: CVE Project
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 1 Dernière mise à jour: 1 year ago
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