CVE-2025-8943: Flowise OS command remote code execution

August 14, 2025 (updated August 18, 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.

References

github.com/FlowiseAI/Flowise
github.com/advisories/GHSA-2vv2-3x8x-4gv7
nvd.nist.gov/vuln/detail/CVE-2025-8943
research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578

Code Behaviors & Features

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