CVE-2025-68613

Comprehensive Technical Analysis of CVE-2025-68613

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-68613

Severity: Critical

CVSS Score: 9.9

Description: The vulnerability affects the n8n open source workflow automation platform. It involves a Remote Code Execution (RCE) flaw in the workflow expression evaluation system. Authenticated users can exploit this vulnerability to execute arbitrary code with the privileges of the n8n process.

Assessment:

• Impact: Full compromise of the affected instance, including unauthorized access to sensitive data, modification of workflows, and execution of system-level operations.
• Exploitability: High, given that it requires authentication but can be exploited through crafted expressions during workflow configuration.
• Severity: The CVSS score of 9.9 indicates a critical vulnerability that poses a significant risk to the integrity, confidentiality, and availability of the affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated Users: The primary attack vector involves authenticated users who have permissions to create or edit workflows.
• Expression Evaluation: The vulnerability is triggered by supplying malicious expressions during workflow configuration.

Exploitation Methods:

• Crafted Expressions: An attacker can craft expressions that, when evaluated, execute arbitrary code.
• Privilege Escalation: The executed code runs with the privileges of the n8n process, potentially leading to full system compromise.

3. Affected Systems and Software Versions

Affected Versions:

• Versions starting with 0.211.0 and prior to 1.120.4, 1.121.1, and 1.122.0.

Fixed Versions:

• The issue has been resolved in versions 1.120.4, 1.121.1, and 1.122.0.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Users are strongly advised to upgrade to the patched versions (1.120.4, 1.121.1, or 1.122.0) which include additional safeguards to restrict expression evaluation.
• Temporary Mitigations:
  • Limit Permissions: Restrict workflow creation and editing permissions to fully trusted users only.
  • Hardened Environment: Deploy n8n in a hardened environment with restricted operating system privileges and limited network access to minimize the impact of potential exploitation.

Long-Term Strategies:

• Regular Updates: Ensure that all software components are regularly updated and patched.
• Access Control: Implement strict access control policies to limit the number of users with workflow creation and editing permissions.
• Monitoring: Enhance monitoring and logging to detect and respond to suspicious activities related to workflow configurations.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Security: Given that n8n is an open source platform, this vulnerability highlights the importance of supply chain security and the need for continuous monitoring and patching of open source components.
• Automation Risks: The incident underscores the risks associated with automation platforms, particularly those that allow user-supplied code or expressions.
• Incident Response: Organizations need robust incident response plans to quickly address and mitigate such critical vulnerabilities.

6. Technical Details for Security Professionals

Technical Overview:

• Expression Evaluation System: The vulnerability resides in the expression evaluation system of n8n, which fails to sufficiently isolate the execution context from the underlying runtime.
• Code Execution: Malicious expressions can be crafted to execute arbitrary code, leading to RCE.
• Privileges: The executed code runs with the privileges of the n8n process, which can include system-level operations.

Detection and Response:

• Log Analysis: Review logs for unusual or unauthorized workflow configurations and expressions.
• Behavioral Analysis: Implement behavioral analysis tools to detect anomalous activities that may indicate exploitation attempts.
• Intrusion Detection: Use intrusion detection systems (IDS) to monitor for suspicious network activities that could be indicative of RCE exploitation.

References:

• GitHub Commit 1
• GitHub Commit 2
• GitHub Commit 3
• GitHub Security Advisory

By following these recommendations and maintaining a proactive security posture, organizations can significantly reduce the risk posed by CVE-2025-68613 and similar vulnerabilities.