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CVE-2025-55205

9.0 · CRITICAL

Capsule is a multi-tenancy and policy-based framework for Kubernetes.

Published Aug 18, 2025CWE-863EPSS 0.46%

Overview

CVE-2025-55205 is a critical-severity vulnerability. It was published on August 18, 2025 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Capsule is a multi-tenancy and policy-based framework for Kubernetes. A namespace label injection vulnerability in Capsule v0.10.3 and earlier allows authenticated tenant users to inject arbitrary labels into system namespaces (kube-system, default, capsule-system), bypassing multi-tenant isolation and potentially accessing cross-tenant resources through TenantResource selectors. This vulnerability enables privilege escalation and violates the fundamental security boundaries that Capsule is designed to enforce. This vulnerability is fixed in 0.10.4.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6eGitHubgithub.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv

How CyberStrike helps

Frequently asked questions

What is CVE-2025-55205?

CVE-2025-55205 is a critical-severity vulnerability. It was published on August 18, 2025 and has a CVSS 3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2025-55205?

This vulnerability has a CVSS 3.1 base score of 9.0, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-55205?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-55205?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-55205 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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