EUVD-2025-33322

Comprehensive Technical Analysis of EUVD-2025-33322

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in EUVD-2025-33322 pertains to Flowise, specifically its WriteFileTool component, which is susceptible to arbitrary file write attacks. The CVSS (Common Vulnerability Scoring System) base score of 10.0 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• AV:N (Network Vector): The vulnerability is exploitable over the network.
• AC:L (Low Complexity): The attack requires low skill or resources.
• PR:L (Low Privileges Required): The attacker needs low-level privileges.
• UI:N (No User Interaction): No user interaction is required for the attack to succeed.
• S:C (Changed Scope): The vulnerability affects a different security scope.
• C:H (High Confidentiality Impact): Complete loss of confidentiality.
• I:H (High Integrity Impact): Complete loss of integrity.
• A:H (High Availability Impact): Complete loss of availability.

This high severity score underscores the critical nature of the vulnerability, necessitating immediate attention and remediation.

2. Potential Attack Vectors and Exploitation Methods

The arbitrary file write vulnerability in Flowise's WriteFileTool can be exploited through several attack vectors:

• Remote Code Execution (RCE): An attacker could write malicious code to critical system files, leading to remote code execution.
• Data Exfiltration: Sensitive data could be written to files accessible to the attacker, facilitating data theft.
• System Compromise: Writing to configuration files or system binaries could compromise the integrity and availability of the system.

Exploitation methods may include:

• Network-Based Attacks: Given the network vector (AV:N), attackers could exploit the vulnerability over the network without needing physical access.
• Automated Scripts: Attackers could use automated scripts to identify and exploit the vulnerability, especially in environments with low-level privileges.

3. Affected Systems and Software Versions

The vulnerability affects Flowise versions prior to 3.0.8. Organizations using these versions are at risk and should prioritize updating to the latest version.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Immediate Patching: Upgrade to Flowise version 3.0.8 or later, which includes the fix for this vulnerability.
• Access Control: Implement strict access controls to limit the privileges of users and applications interacting with the WriteFileTool.
• Network Segmentation: Segregate critical systems and limit network access to reduce the attack surface.
• Monitoring and Logging: Enhance monitoring and logging to detect any suspicious file write activities.
• Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.

5. Impact on European Cybersecurity Landscape

The critical nature of this vulnerability poses significant risks to European organizations using Flowise. The potential for remote code execution and data exfiltration could lead to severe breaches, impacting confidentiality, integrity, and availability. This underscores the need for robust cybersecurity measures and timely patch management across the EU.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Identification: The vulnerability is identified by EUVD-2025-33322 and CVE-2025-61913.

• References:

  • GitHub Security Advisories: GHSA-jv9m-vf54-chjj, GHSA-j44m-5v8f-gc9c
  • GitHub Commit: 1fb12cd93143592a18995f63b781d25b354d48a3
  • Release Notes: Flowise 3.0.8
  • NVD Entry: CVE-2025-61913
  • Pull Request: #5275

• ENISA IDs:

  • Product: d5d286c2-7d0c-313d-8b61-f4a66815da6a (Flowise < 3.0.8)
  • Vendor: 0a391aa7-993f-3101-96eb-2d96adaf0494 (FlowiseAI)

Security professionals should review these references for detailed technical information and guidance on remediation.

Conclusion

The arbitrary file write vulnerability in Flowise's WriteFileTool is a critical issue that requires immediate attention. Organizations should prioritize patching and implementing robust security measures to mitigate the risk. The European cybersecurity landscape must remain vigilant against such vulnerabilities to protect against potential breaches and ensure the integrity and security of digital assets.