flowiseai/flowise · Security
Flowise OS command remote code execution
- GHSA ID
- GHSA-2vv2-3x8x-4gv7
- CVE ID
- CVE-2025-8943
- Severity
- critical
- Published
- Updated
- CVSS
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 9.8 · CVSS: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.
CWEs
- CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CWE-306 · Missing Authentication for Critical Function