VULNERABILITY INTELLIGENCE

CVE-2025-8943

CVSS score9.8 CRITICAL
EPSS probability75.20%
CISA KEVNot currently listed
Published2025-08-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-306

Primary references