EUVD-2025-24801

Comprehensive Technical Analysis of EUVD-2025-24801

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-24801 pertains to the Custom MCPs feature in Flowise, which allows the execution of OS commands. The critical issue lies in the minimal authentication and authorization model, particularly the lack of role-based access controls (RBAC). In versions before 3.0.1, the default installation operates without authentication, enabling unauthenticated network attackers to execute unsandboxed OS commands.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS:3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates a critical vulnerability due to the ease of exploitation (low complexity, no user interaction required) and the severe impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Remote Code Execution (RCE): Attackers can exploit the vulnerability to execute arbitrary OS commands without authentication.
• Network-Based Attacks: Given the network attack vector (AV:N), attackers can remotely exploit this vulnerability over the network.

Exploitation Methods:

• Direct OS Command Execution: Attackers can send crafted requests to the Flowise server to execute OS commands.
• Lateral Movement: Once an attacker gains access, they can move laterally within the network, compromising other systems.

3. Affected Systems and Software Versions

Affected Software:

• Flowise versions before 3.0.1

Systems:

• Any system running the affected versions of Flowise, particularly those with the Custom MCPs feature enabled and default configurations.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade to Version 3.0.1 or Later: Ensure all instances of Flowise are updated to the latest version that includes the necessary security patches.
• Enable Authentication: Explicitly configure authentication mechanisms to prevent unauthenticated access.

Long-Term Mitigations:

• Implement RBAC: Enhance the authentication and authorization model by implementing role-based access controls.
• Network Segmentation: Segregate Flowise servers from other critical systems to limit the scope of potential attacks.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations within the European Union, particularly those relying on Flowise for critical operations. The potential for unauthenticated RCE can lead to data breaches, system compromises, and significant financial and reputational damage. Given the stringent data protection regulations in the EU, such as GDPR, organizations must prioritize addressing this vulnerability to avoid legal and regulatory consequences.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2025-8943
• Assigner: JFROG
• References: JFrog Research

Technical Analysis:

• Custom MCPs Feature: This feature allows the execution of OS commands using tools like npx. The lack of RBAC and default authentication settings exacerbate the risk.
• Exploitation: Attackers can send specially crafted HTTP requests to the Flowise server to execute arbitrary OS commands. This can be done without any authentication, making the attack vector highly accessible.

Detection and Monitoring:

• Log Analysis: Monitor server logs for unusual command executions and unauthorized access attempts.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious network activities targeting Flowise servers.

Patch Management:

• Automated Updates: Implement automated update mechanisms to ensure timely patching of vulnerabilities.
• Configuration Management: Regularly review and update configurations to enforce security best practices.

Conclusion: The vulnerability in Flowise, as described in EUVD-2025-24801, is critical and requires immediate attention. Organizations must prioritize upgrading to the latest version, enabling authentication, and implementing robust access controls to mitigate the risk. Regular security audits and proactive monitoring are essential to maintain a secure cybersecurity posture.