CVE-2025-64427 is a Server-Side Request Forgery (SSRF) vulnerability classified under CWE-918 and CWE-200, affecting IceWhaleTech's ZimaOS, an operating system forked from CasaOS designed for Zima devices and x86-64 systems with UEFI firmware. In versions prior to 1.5.0, the system fails to properly validate or restrict URLs in requests crafted by authenticated local users. This flaw allows these users to send requests to internal IP addresses, including loopback addresses (127.0.0.1, localhost) and private network ranges, which are typically shielded from external or unauthorized access. By exploiting this, an attacker can interact with internal HTTP/HTTPS services that are not intended to be exposed to local users, potentially retrieving sensitive information or leveraging internal services for further attacks. The vulnerability requires the attacker to have local authenticated access but does not require any additional user interaction. The CVSS 3.1 base score is 7.1, indicating a high severity due to the network attack vector, low attack complexity, and high confidentiality impact, though integrity and availability impacts are minimal. No patches or mitigations have been publicly released, and no known exploits have been reported in the wild. This vulnerability highlights the risks of insufficient input validation in internal request handling mechanisms within operating systems tailored for specialized hardware.

The primary impact of CVE-2025-64427 is the potential exposure of sensitive internal services and data within networks running ZimaOS. Attackers with authenticated local access can leverage the SSRF flaw to bypass network segmentation and access internal HTTP/HTTPS services that are otherwise inaccessible. This can lead to unauthorized disclosure of confidential information, such as configuration data, credentials, or internal APIs. While the vulnerability does not directly compromise data integrity or system availability, the information gained could facilitate further attacks, including privilege escalation or lateral movement within the network. Organizations deploying ZimaOS in environments with sensitive internal services are at risk of internal reconnaissance and data leakage. The requirement for local authentication limits the attack surface but does not eliminate risk, especially in multi-user or shared environments. The lack of a public patch increases exposure duration, emphasizing the need for immediate mitigation. The vulnerability could be particularly impactful in environments where ZimaOS devices are used as gateways or control points within critical infrastructure or enterprise networks.

To mitigate CVE-2025-64427, organizations should first restrict and monitor local user access to ZimaOS systems, ensuring that only trusted users have authenticated local accounts. Implement strict access controls and auditing to detect unusual request patterns targeting internal IP ranges. Network segmentation should be enforced to limit the exposure of sensitive internal HTTP/HTTPS services, potentially by using firewall rules or network policies that restrict access from ZimaOS devices to critical internal services. Until an official patch is released, consider disabling or restricting features in ZimaOS that allow user-initiated URL requests or proxying to internal services. Employ application-layer filtering or proxy solutions that validate and sanitize URLs before processing. Regularly review and update authentication mechanisms to prevent unauthorized local access. Additionally, monitor logs for signs of SSRF exploitation attempts, such as requests to localhost or private IP addresses originating from authenticated users. Engage with IceWhaleTech for updates on patches and apply them promptly once available. Finally, consider isolating ZimaOS devices in less sensitive network segments if feasible.