What is the CVSS score of CVE-2025-27095?

CVE-2025-27095 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.2%.

Which versions of Kubernetes are affected by CVE-2025-27095?

Organizations using JumpServer should be aware of moderate risk from CVE-2025-27095 rated CVSS 4.3. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for CVE-2025-27095?

Yes, a public proof-of-concept exploit is available for CVE-2025-27095. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-27095?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Kubernetes CVE-2025-27095

MEDIUM

Incorrect Privilege Assignment (CWE-266)

2025-03-31 security-advisories@github.com

Authentication Bypass Kubernetes Jumpserver Fit2Cloud

4.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.3 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:34 vuln.today

PoC Detected

Nov 12, 2025 - 15:50 vuln.today

Public exploit code

CVE Published

Mar 31, 2025 - 16:15 nvd

MEDIUM 4.3

DescriptionGitHub Advisory

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.8.0 and 3.10.18, an attacker with a low-privileged account can access the Kubernetes session feature and manipulate the kubeconfig file to redirect API requests to an external server controlled by the attacker. This allows the attacker to intercept and capture the Kubernetes cluster token. This can potentially allow unauthorized access to the cluster and compromise its security. This vulnerability is fixed in 4.8.0 and 3.10.18.

AnalysisAI

JumpServer is an open source bastion host and an operation and maintenance security audit system. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-266. JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.8.0 and 3.10.18, an attacker with a low-privileged account can access the Kubernetes session feature and manipulate the kubeconfig file to redirect API requests to an external server controlled by the attacker. This allows the attacker to intercept and capture the Kubernetes cluster token. This can potentially allow unauthorized access to the cluster and compromise its security. This vulnerability is fixed in 4.8.0 and 3.10.18. Affected products include: Fit2Cloud Jumpserver. Version information: Prior to 4.8.0.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.