How severe is CVE-2025-27095?

CVE-2025-27095 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-27095 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27095?

CVE-2025-27095 affects Fit2cloud Jumpserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27095?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27095 have an EU (EUVD) identifier?

Yes. CVE-2025-27095 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8756.

When was CVE-2025-27095 published?

CVE-2025-27095 was published on 2025-03-31 and last updated on 2026-06-17.

CVE-2025-27095

CVE-2025-27095 is a medium-severity vulnerability in Fit2cloud Jumpserver with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-266.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-8756
Weakness: CWE-266
Affected product: Fit2cloud Jumpserver
Published: 2025-03-31
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-27095?: 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.
How severe is CVE-2025-27095?: CVE-2025-27095 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-27095 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27095?: CVE-2025-27095 affects Fit2cloud Jumpserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27095?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27095 have an EU (EUVD) identifier?: Yes. CVE-2025-27095 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-8756.
When was CVE-2025-27095 published?: CVE-2025-27095 was published on 2025-03-31 and last updated on 2026-06-17.

References

https://github.com/jumpserver/jumpserver/security/advisories/GHSA-5q9w-f4wh-f535

Affected products (1)

cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*

More vulnerabilities in Fit2cloud Jumpserver

CVE-2024-40629 — Critical (CVSS 10.0): JumpServer is an open-source Privileged Access Management (PAM) tool that provides DevOps and IT teams with on-demand…
CVE-2024-40628 — Critical (CVSS 10.0): JumpServer is an open-source Privileged Access Management (PAM) tool that provides DevOps and IT teams with on-demand…
CVE-2024-29202 — Critical (CVSS 9.9): JumpServer is an open source bastion host and an operation and maintenance security audit system. Attackers can exploit…
CVE-2024-29201 — Critical (CVSS 9.9): JumpServer is an open source bastion host and an operation and maintenance security audit system. Attackers can bypass…
CVE-2023-48193 — Critical (CVSS 9.8): Insecure Permissions vulnerability in JumpServer GPLv3 v.3.8.0 allows a remote attacker to execute arbitrary code via…
CVE-2025-62712 — Critical (CVSS 9.6): JumpServer is an open source bastion host and an operation and maintenance security audit system. In JumpServer…

All CVEs affecting Fit2cloud Jumpserver →

Other CWE-266 (Incorrect Privilege Assignment) vulnerabilities

CVE-2026-23800 — Critical (CVSS 10.0): Incorrect Privilege Assignment vulnerability in Modular DS modular-connector allows Privilege Escalation.This issue…
CVE-2025-41115 — Critical (CVSS 10.0): SCIM provisioning was introduced in Grafana Enterprise and Grafana Cloud in April to improve how organizations manage…
CVE-2024-9479 — Critical (CVSS 10.0): Improper Privilege Management vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Privilege…
CVE-2024-9478 — Critical (CVSS 10.0): Improper Privilege Management vulnerability in upKeeper Solutions upKeeper Instant Privilege Access allows Privilege…
CVE-2026-42368 — Critical (CVSS 9.9): A privilege escalation vulnerability exists in the Web Interface functionality of GeoVision LPC2011/LPC2211 1.10. A…
CVE-2026-32922 — Critical (CVSS 9.9): OpenClaw before 2026.3.11 contains a privilege escalation vulnerability in device.token.rotate that allows callers with…

Browse all CWE-266 (Incorrect Privilege Assignment) vulnerabilities →