CVE-2025-59377 is a vulnerability classified as CWE-78, which involves improper neutralization of special elements used in an OS command, commonly known as OS command injection. This vulnerability affects the feiskyer mcp-kubernetes-server product, specifically versions up to 0.1.11. The root cause is the use of shell=True in the /mcp/kubectl endpoint, which allows an attacker to inject arbitrary OS commands. Notably, this injection is possible even in read-only mode, indicating that the application does not properly sanitize or validate input before passing it to the shell. The vulnerability is unrelated to another similarly named product and CVE (mcp-server-kubernetes and CVE-2025-53355). The CVSS v3.1 base score is 3.7, indicating a low severity level, with the vector AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N. This means the attack can be performed remotely over the network without privileges or user interaction, but requires high attack complexity. The impact is limited to integrity loss, with no confidentiality or availability impact. There are no known exploits in the wild and no patches currently available. The vulnerability arises from the unsafe use of shell=True in command execution, which is a common security anti-pattern that can lead to command injection if user input is not properly sanitized. Given the product is related to Kubernetes server management, exploitation could allow an attacker to execute arbitrary commands on the host running the vulnerable service, potentially leading to further compromise depending on the environment and privileges of the service. However, the high attack complexity and lack of privilege requirements somewhat limit the risk. The vulnerability's presence in a Kubernetes-related management server suggests that it could be targeted in cloud-native or containerized environments where feiskyer mcp-kubernetes-server is deployed.

For European organizations, the impact of CVE-2025-59377 depends largely on the adoption of the feiskyer mcp-kubernetes-server product within their Kubernetes infrastructure. If deployed, exploitation could allow remote attackers to execute arbitrary OS commands on the server hosting the vulnerable service, potentially leading to integrity violations such as unauthorized changes to configurations or data. Although the CVSS score is low and the attack complexity is high, the risk remains significant in sensitive environments where Kubernetes management servers are critical. Integrity loss could disrupt container orchestration or introduce malicious configurations, indirectly affecting service reliability or security posture. Since no confidentiality or availability impacts are indicated, direct data leakage or denial of service is unlikely. However, given the central role of Kubernetes in many European enterprises' cloud and container strategies, any compromise of management components could have cascading effects. The lack of required privileges or user interaction means attackers can attempt exploitation remotely, increasing exposure if the service is internet-facing or accessible from untrusted networks. European organizations with strict regulatory requirements around system integrity and security (e.g., GDPR, NIS Directive) should consider this vulnerability seriously to avoid compliance risks and potential operational disruptions.

To mitigate CVE-2025-59377, European organizations should implement the following specific measures: 1) Immediately audit deployments to identify any instances of feiskyer mcp-kubernetes-server version 0.1.11 or earlier. 2) Restrict network access to the /mcp/kubectl endpoint to trusted internal networks only, using firewall rules or network segmentation to reduce exposure. 3) If possible, disable or restrict the vulnerable endpoint until a patch or update is available. 4) Review and harden input validation and sanitization in any custom integrations or scripts interacting with the mcp-kubernetes-server, especially those invoking shell commands. 5) Monitor logs and network traffic for unusual command execution attempts or anomalies related to the /mcp/kubectl endpoint. 6) Engage with the vendor or community to obtain patches or updated versions that remove the use of shell=True or properly sanitize inputs. 7) Employ runtime security tools or host-based intrusion detection systems to detect and block suspicious command execution patterns. 8) Educate DevOps and security teams about the risks of shell=True usage and enforce secure coding practices in Kubernetes management tooling. These targeted actions go beyond generic advice by focusing on network-level controls, endpoint-specific restrictions, and proactive detection tailored to this vulnerability's characteristics.