Overview
CVE-2025-64660 describes an improper access control vulnerability affecting both GitHub Copilot and Visual Studio Code. This flaw allows a potentially authorized attacker to bypass a security feature over a network, leading to unauthorized actions or data access. The vulnerability was published on November 20, 2025.
Technical Details
The specifics of the vulnerability reveal that the access control mechanisms in GitHub Copilot and Visual Studio Code, when interacting over a network (e.g., through remote development features), are susceptible to bypass. The vulnerability likely stems from inadequate validation of user permissions or improper handling of network requests. While Microsoft hasn’t released the specific technical details in their advisory, the nature of the vulnerability suggests a flaw in the communication protocols or the privilege escalation prevention mechanisms used by Copilot and VS Code when communicating with remote resources or extensions.
CVSS Analysis
The vulnerability has been assigned a CVSS score of 5.7, indicating a MEDIUM severity. This score considers factors like attack vector, attack complexity, privileges required, user interaction, scope, confidentiality impact, integrity impact, and availability impact. While not critical, a CVSS score of 5.7 signifies that the vulnerability could be exploited with relative ease and could have moderate consequences.
Possible Impact
Successful exploitation of CVE-2025-64660 could lead to several potential impacts:
- Unauthorized Code Execution: An attacker might be able to execute arbitrary code within the context of the user running Visual Studio Code or GitHub Copilot.
- Data Breach: Sensitive information, such as API keys or source code, could be accessed or modified without authorization.
- System Compromise: Depending on the privileges of the user and the configuration of the environment, a successful exploit could potentially lead to a compromise of the entire system.
- Denial of Service: An attacker could potentially disrupt the functionality of Copilot or VS Code, leading to a denial of service for legitimate users.
Mitigation and Patch Steps
To address CVE-2025-64660, users are strongly advised to take the following steps:
- Apply the Latest Updates: Ensure that both GitHub Copilot and Visual Studio Code are updated to the latest versions. Microsoft has likely released patches to address this vulnerability. Check for updates within the applications or via the official Microsoft channels.
- Review Network Configurations: Carefully review any network configurations related to remote development or extension usage in Visual Studio Code and Copilot. Ensure that proper access controls are in place.
- Exercise Caution with Extensions: Be cautious when installing extensions from untrusted sources. Malicious extensions can exacerbate the impact of this vulnerability.
- Monitor for Suspicious Activity: Keep an eye on system logs and network traffic for any signs of unauthorized activity.
