Vulnerability DatabaseCVE-2025-8943
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CVE-2025-8943
August 14, 2025
The Custom MCPs feature is designed to execute OS commands, for instance, using tools like "npx" to spin up local MCP Servers. However, Flowise's inherent authentication and authorization model is minimal and lacks role-based access controls (RBAC). Furthermore, in Flowise versions before 3.0.1 the default installation operates without authentication unless explicitly configured. This combination allows unauthenticated network attackers to execute unsandboxed OS commands.
Related Resources (1)
https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/
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CVSS v4
Base Score:
8.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Exploit Maturity
FUNCTIONAL
Weakness Type (CWE)
Missing Authentication for Critical Function
CWE-306
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-78
Missing Authorization
CWE-862
EPSS
Base Score:
78.81