// For flags

CVE-2025-23047

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

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-01-10 CVE Reserved
  • 2025-01-22 CVE Published
  • 2025-01-23 EPSS Updated
  • 2025-02-12 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cilium
Search vendor "Cilium"
 Cilium
Search vendor "Cilium" for product "Cilium"
 >= 1.14.0 < 1.14.18
Search vendor "Cilium" for product "Cilium" and version " >= 1.14.0 < 1.14.18"
en
Affected
Cilium
Search vendor "Cilium"
 Cilium
Search vendor "Cilium" for product "Cilium"
 >= 1.15.0 < 1.15.12
Search vendor "Cilium" for product "Cilium" and version " >= 1.15.0 < 1.15.12"
en
Affected
Cilium
Search vendor "Cilium"
 Cilium
Search vendor "Cilium" for product "Cilium"
 >= 1.16.0 < 1.16.5
Search vendor "Cilium" for product "Cilium" and version " >= 1.16.0 < 1.16.5"
en
Affected