CVE-2025-64671 is a command injection vulnerability classified under CWE-77, found in the Microsoft GitHub Copilot Plugin for JetBrains IDEs, specifically version 1.0.0. The vulnerability arises from improper neutralization of special elements used in commands, allowing an attacker to inject malicious commands that the plugin executes locally. This flaw does not require any privileges or user interaction, but the attacker must have local access to the system where the plugin is installed. The vulnerability impacts the confidentiality, integrity, and availability of the affected system by enabling arbitrary code execution. The CVSS v3.1 score is 8.4 (high), reflecting the ease of exploitation and the critical impact of the vulnerability. Although no exploits are currently known to be in the wild, the risk is significant given the widespread use of JetBrains IDEs in software development. The vulnerability could be exploited by malicious insiders or through compromised local accounts to execute arbitrary commands, potentially leading to full system compromise or lateral movement within a network. The plugin’s improper input validation or sanitization of command elements is the root cause, which allows injection of shell commands or other OS-level instructions. No official patches have been released yet, so mitigation relies on restricting access and monitoring. This vulnerability highlights the risks introduced by integrating AI-assisted coding tools without rigorous security controls.

For European organizations, this vulnerability poses a significant risk especially to software development teams using JetBrains IDEs with the GitHub Copilot plugin. Successful exploitation could lead to unauthorized code execution, data theft, system compromise, or disruption of development workflows. Confidentiality is at risk as attackers could access sensitive source code or credentials stored on developer machines. Integrity could be compromised by injecting malicious code into development environments, potentially propagating to production systems. Availability could be affected if attackers disrupt IDE operations or the underlying system. The local access requirement limits remote exploitation but insider threats or compromised endpoints remain critical concerns. The impact is heightened in sectors with high reliance on software development such as finance, telecommunications, and critical infrastructure. Additionally, the use of AI-assisted coding tools is growing in Europe, increasing the attack surface. Organizations may face compliance and reputational risks if source code or intellectual property is exposed or tampered with.

1. Immediately restrict local access to systems running JetBrains IDEs with the GitHub Copilot plugin to trusted personnel only. 2. Disable or uninstall the GitHub Copilot plugin version 1.0.0 until a patched version is released by Microsoft. 3. Monitor local system logs and IDE activity for unusual command executions or suspicious behavior indicative of exploitation attempts. 4. Implement endpoint detection and response (EDR) solutions to detect anomalous process executions or command injections on developer machines. 5. Enforce strict access controls and multi-factor authentication on developer workstations to reduce risk of unauthorized local access. 6. Educate developers and IT staff about the risks of command injection vulnerabilities and the importance of secure plugin management. 7. Follow Microsoft and JetBrains advisories closely and apply patches or updates as soon as they become available. 8. Consider network segmentation to isolate development environments from critical production systems to limit lateral movement. 9. Conduct regular security assessments of development tools and plugins to identify and remediate vulnerabilities proactively.