CVE-2025-55526

Comprehensive Technical Analysis of CVE-2025-55526

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-55526 Description: The vulnerability in the n8n-workflows project, specifically in the main commit ee25413, allows attackers to perform a directory traversal attack via the download_workflow function within api_server.py.

CVSS Score: 9.1 Severity: Critical

The CVSS score of 9.1 indicates a high level of severity. This score is likely due to the potential for unauthorized access to sensitive files, which can lead to data breaches, system compromise, and further exploitation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Directory Traversal: An attacker can manipulate the input to the download_workflow function to navigate through directories and access files outside the intended directory.
• Remote Code Execution: If the traversal allows access to critical system files or configuration files, it could potentially lead to remote code execution.

Exploitation Methods:

• Crafted Input: An attacker can send specially crafted input to the download_workflow function, such as ../../../../etc/passwd, to access sensitive files.
• Automated Scripts: Attackers may use automated scripts to scan for vulnerable endpoints and exploit the directory traversal vulnerability.

3. Affected Systems and Software Versions

Affected Systems:

• Systems running the n8n-workflows software with the main commit ee25413.
• Any environment where api_server.py is deployed and accessible.

Software Versions:

• Specifically, the version of n8n-workflows corresponding to the main commit ee25413.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Apply the latest patches or updates provided by the n8n-workflows project to address the vulnerability.
• Input Validation: Implement strict input validation and sanitization for the download_workflow function to prevent directory traversal.
• Access Controls: Restrict access to the download_workflow function to authorized users only.

Long-Term Strategies:

• Code Review: Conduct a thorough code review to identify and fix similar vulnerabilities.
• Security Training: Provide security training for developers to understand and mitigate common vulnerabilities like directory traversal.
• Regular Updates: Ensure that all software dependencies are regularly updated to their latest versions.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Data Breaches: Organizations using the affected version of n8n-workflows are at risk of data breaches and unauthorized access.
• System Compromise: Attackers can exploit this vulnerability to gain control over affected systems, leading to further attacks.

Long-Term Impact:

• Reputation Damage: Organizations experiencing data breaches due to this vulnerability may face reputational damage.
• Increased Awareness: This incident highlights the importance of secure coding practices and regular security audits.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: download_workflow in api_server.py
• Commit: ee25413
• Issue Tracker: GitHub Issue #48

Exploitation Example:

# Example of a vulnerable function
def download_workflow(filename):
    with open(filename, 'rb') as file:
        return file.read()

# Exploitation
download_workflow('../../../../etc/passwd')

Mitigation Code Example:

import os

def download_workflow(filename):
    # Ensure the filename does not contain directory traversal sequences
    sanitized_filename = os.path.basename(filename)
    with open(sanitized_filename, 'rb') as file:
        return file.read()

References:

• GitHub Issue #48

Conclusion

CVE-2025-55526 represents a critical vulnerability that requires immediate attention. Organizations should prioritize patching and implementing robust input validation to mitigate the risk. This incident underscores the importance of secure coding practices and regular security audits in maintaining a strong cybersecurity posture.