CVE-2025-67489 is a critical vulnerability in the vite-plugin-react package, specifically in versions 0.5.5 and below, which provide React Server Components (RSC) support for the Vite development environment. The vulnerability stems from improper control over dynamic imports within server function APIs such as loadServerAction, decodeReply, and decodeAction. These APIs are used in RSC applications to expose server function endpoints. Due to unsafe dynamic import handling, an attacker with network access to the development server can inject arbitrary code remotely, leading to remote code execution (RCE). This allows the attacker to read or modify files on the development server, exfiltrate sensitive information including source code, environment variables, and credentials, and potentially pivot to other internal services within the network. The risk is heightened when developers use the vite --host option, which exposes the development server on all network interfaces, making it accessible beyond localhost. While the vulnerability affects only development servers and not production builds, the exposure of sensitive development assets and the possibility of lateral movement make this a critical security issue. The vulnerability is classified under CWE-94, indicating improper control over code generation, and has been assigned a CVSS v3.1 score of 9.8, reflecting its critical impact and ease of exploitation without authentication or user interaction. The issue was publicly disclosed on December 9, 2025, and fixed in vite-plugin-react version 0.5.6. No known exploits have been reported in the wild at the time of disclosure.

For European organizations, this vulnerability poses a significant risk primarily in development environments where vite-plugin-react is used for React Server Components. The exposure of development servers to internal or external networks can lead to unauthorized remote code execution, resulting in the compromise of source code, environment variables, and credentials. This can lead to intellectual property theft, leakage of sensitive configuration data, and potential compromise of downstream production systems if attackers pivot from the development environment. Organizations with distributed development teams or those using cloud-based development environments that expose dev servers externally are particularly at risk. The impact extends beyond confidentiality to integrity and availability, as attackers could modify code or disrupt development workflows. Given the critical CVSS score, exploitation could lead to full system compromise of the development server, undermining trust in the software supply chain and increasing the risk of supply chain attacks. The vulnerability also raises compliance concerns under European data protection regulations if sensitive personal data or credentials are exposed.

European organizations should immediately upgrade vite-plugin-react to version 0.5.6 or later to remediate the vulnerability. Development servers should not be exposed to external networks; avoid using the vite --host option to bind the server to all network interfaces unless strictly necessary and secured. Implement network segmentation and firewall rules to restrict access to development servers to trusted internal IP addresses only. Use VPNs or secure tunnels for remote development access instead of exposing dev servers publicly. Regularly audit development environments for exposed services and monitor network traffic for unusual access patterns. Employ strict access controls and multi-factor authentication for developer machines and environments. Additionally, review and sanitize any dynamic import usage in custom server functions to prevent unsafe code execution. Incorporate security scanning tools into the CI/CD pipeline to detect vulnerable dependencies and enforce timely patching. Finally, educate development teams about the risks of exposing development servers and best practices for secure development.