Description
Improper neutralization of special elements used in an OS command ('command injection') in Cursor allows an unauthorized attacker to execute commands that are outside of those specified in the allowlist, resulting in arbitrary code execution.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-199728
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-199728 pertains to a command injection flaw in the Cursor software. This type of vulnerability allows an unauthorized attacker to execute arbitrary commands on the system, bypassing the intended allowlist of commands. The severity of this vulnerability is rated at a base score of 9.8 according to CVSS v3.1, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:
- Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources to exploit.
- Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
- Scope (S): Unchanged (U) - The vulnerability does not change the security scope.
- Confidentiality (C): High (H) - The vulnerability can lead to a complete breach of confidentiality.
- Integrity (I): High (H) - The vulnerability can lead to a complete breach of integrity.
- Availability (A): High (H) - The vulnerability can lead to a complete breach of availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector for this vulnerability is through network-based exploitation. An attacker could craft malicious input that includes special elements used in OS commands, which the Cursor software fails to properly neutralize. This could allow the attacker to execute arbitrary commands on the system, leading to:
- Remote Code Execution (RCE): The attacker can run any command on the system, potentially leading to full system compromise.
- Data Exfiltration: The attacker can extract sensitive information from the system.
- System Compromise: The attacker can install malware, create backdoors, or perform other malicious activities.
3. Affected Systems and Software Versions
The vulnerability affects the Cursor software versions 1.3.4 through 1.9.9. All systems running these versions of Cursor are at risk. It is crucial to identify and update these systems to mitigate the risk.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Patch Management: Immediately update the Cursor software to version 2.0 or later, which includes a fix for this vulnerability.
- Input Validation: Implement strict input validation and sanitization to neutralize special elements used in OS commands.
- Least Privilege: Ensure that the Cursor software runs with the least privileges necessary to minimize the impact of a successful exploit.
- Network Segmentation: Segment the network to limit the attack surface and contain potential breaches.
- Monitoring and Logging: Enhance monitoring and logging to detect and respond to any suspicious activities related to command execution.
5. Impact on European Cybersecurity Landscape
The critical nature of this vulnerability poses a significant risk to the European cybersecurity landscape. Organizations and individuals using the affected versions of Cursor software are at high risk of data breaches, system compromises, and other cyber threats. The widespread use of Cursor software in various sectors, including healthcare, finance, and government, amplifies the potential impact.
6. Technical Details for Security Professionals
For security professionals, the following technical details are essential:
- Detection: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block attempts to exploit this vulnerability.
- Response: Develop and test incident response plans to quickly address any detected exploitation attempts.
- Forensics: Conduct thorough forensic analysis to understand the scope and impact of any successful exploitation.
- Awareness: Educate users and administrators about the risks and best practices for mitigating command injection vulnerabilities.
Conclusion
The command injection vulnerability in Cursor software, as described in EUVD-2025-199728, is a critical threat that requires immediate attention. Organizations should prioritize updating affected systems, implementing robust security measures, and maintaining vigilant monitoring to protect against potential exploitation. The European cybersecurity community must collaborate to address this vulnerability and enhance overall cyber resilience.