CVE-2020-8553 - CVE House
Back to Database
Status published Medium CVE-2020-8553

Kubernetes ingress-nginx Compromise of auth via subset/superset namespace names

Vulnerability Description

The Kubernetes ingress-nginx component prior to version 0.28.0 allows a user with the ability to create namespaces and to read and create ingress objects to overwrite the password file of another ingress which uses nginx.ingress.kubernetes.io/auth-type: basic and which has a hyphenated namespace or secret name.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-8553

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Alex Orange

References

More from Kubernetes

View All →
CVE-2025-9708
Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks
Medium 6.8
CVE-2025-7445
Kubernetes secrets-store-sync-controller discloses service account tokens in logs
Medium 6.5
CVE-2025-7342
VM images built with Kubernetes Image Builder Nutanix or OVA providers use default credentials for Windows images if user did not override
High 7.5
CVE-2025-5187
Nodes can delete themselves by adding an OwnerReference
Medium 6.7
CVE-2025-4563
Nodes can bypass dynamic resource allocation authorization checks
Low 2.7

Affected Vendor

Affected Software

ingress-nginx
Vulnerable Versions:
unspecified

Timeline

Official Publish: July 29th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-73

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1005 Data from Local System
Collection
T1105 Ingress Tool Transfer
Command and Control
T1574 Hijack Execution Flow
Privilege Escalation
T1565 Data Manipulation
Impact