CVE-2025-8943

Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers

Published Aug 14, 2025 CVSS 3.1 · 9.8 Critical EPSS 75.3% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-24801 Flowise OS command remote code execution
Github GHSA Github GHSA GHSA-2vv2-3x8x-4gv7 Flowise OS command remote code execution
History
Type Values Removed Values Added
CPEs cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-306
CWE-862
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Flowiseai
Flowiseai flowise
Vendors & Products Flowiseai
Flowiseai flowise
Type Values Removed Values Added
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.
Title Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
JFROG
Published
Updated
Aug 18, 2025, 4:47 PM
Reserved
Aug 13, 2025, 1:30 PM
Status
Analyzed
Published
Aug 14, 2025, 10:15 AM
Modified
Jun 17, 2026, 10:07 AM