What is CVE-2025-55205?

CVE-2025-55205 is a critical-severity vulnerability in Projectcapsule Capsule, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2025-08-18.

How severe is CVE-2025-55205?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-55205 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Projectcapsule Capsule

CVE-2025-55205

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…

Vulnerability class: Broken Access Control

EPSS: 0.000 (6.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Projectcapsule Capsule — versions < 0.10.4

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/projectcapsule/capsule/security/advisories/GHSA-fcpm-6mxq-m5vv (x_refsource_CONFIRM)
https://github.com/projectcapsule/capsule/commit/e1f47feade6e1695b2204407607d07c3b3994f6e (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-55205?: CVE-2025-55205 is a critical-severity vulnerability in Projectcapsule Capsule, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2025-08-18.
How severe is CVE-2025-55205?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-55205 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.