CVE-2025-54313 is a supply chain vulnerability classified under CWE-506 (Embedded Malicious Code) that affects the eslint-config-prettier package, a widely used configuration package for integrating Prettier with ESLint in JavaScript and TypeScript projects. The affected versions (8.10.1, 9.1.1, 10.1.6, and 10.1.7) contain malicious code embedded within the install.js script, which executes automatically during package installation. This script launches a malicious Windows DLL named node-gyp.dll, which is malware designed to compromise the host system. The attack vector requires no user interaction or privileges, as the malicious code runs as part of the normal package installation process, typically executed by developers or automated CI/CD pipelines. The CVSS 3.1 score of 7.5 reflects a high severity due to the potential for high integrity impact (codebase and environment compromise) and the scope being changed (the vulnerability affects multiple systems downstream of the compromised package). The vulnerability does not affect availability but can lead to unauthorized code execution and potential further exploitation within affected environments. No patches or fixes are currently linked, emphasizing the need for immediate manual mitigation steps. The absence of known exploits in the wild suggests this is a newly discovered issue, but the supply chain nature makes it particularly dangerous as it can silently propagate through development environments and production deployments.

For European organizations, this vulnerability poses a significant risk to software development integrity and security. Organizations relying on Node.js and JavaScript development stacks that include eslint-config-prettier are vulnerable to supply chain attacks that can lead to unauthorized code execution, insertion of backdoors, or further malware deployment. This can compromise source code integrity, leak sensitive intellectual property, and enable attackers to pivot within corporate networks. The impact is especially critical for sectors with high software development activity such as finance, telecommunications, and technology companies. Additionally, compromised CI/CD pipelines can lead to widespread distribution of malicious code into production environments, affecting availability and trust in software products. The stealthy nature of supply chain attacks complicates detection and remediation, increasing the risk of prolonged undetected compromise. European organizations with automated build and deployment systems are particularly at risk if they do not validate package integrity or monitor for anomalous behavior during package installation.

1. Immediately audit all projects and build environments for usage of eslint-config-prettier versions 8.10.1, 9.1.1, 10.1.6, and 10.1.7 and remove or replace them with unaffected versions. 2. Use package integrity verification tools such as npm audit, Snyk, or other software composition analysis tools to detect compromised packages. 3. Implement strict supply chain security practices including locking dependencies to known good versions using package-lock.json or yarn.lock files. 4. Employ reproducible builds and verify checksums of packages before installation. 5. Monitor CI/CD pipelines for unexpected network connections or execution of unknown binaries during package installation. 6. Restrict build environments to run with least privilege and isolate them to limit malware impact. 7. Engage with package maintainers and official repositories to track release of patched versions and apply updates promptly. 8. Educate developers and DevOps teams about supply chain risks and encourage vigilance when adding or updating dependencies. 9. Consider using tools that sandbox or analyze package installation scripts before deployment. 10. Maintain robust endpoint detection and response (EDR) solutions to detect and respond to malicious DLL execution on Windows hosts.