CVEvulnerability

CVE-2025-8943

9.8 CRITICAL Published 2025-08-14 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2025-08-14
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-306, CWE-862

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.

Affected configurations

• flowiseai flowise (< 3.0.1)

Related

Weakness · CWE (2)

  • CWE-306 Missing Authentication for Critical Functionality weakness
  • CWE-862 Missing Authorization weakness

References