AI agent vulnerability · Flowise

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

criticalCVSS 3.1 9.8GHSA-2vv2-3x8x-4gv7

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.

Published Aug 14, 2025 · Updated Aug 18, 2025

Affected packages

flowise

Ecosystem: npm
Affected: <= 3.0.5
Fixed in: No patched version yet
Check: npm ls flowise

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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