CVE-2025-8943

CRITICAL EPSS 99.3%
Published Aug 14, 202510mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
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Published Aug 14, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
99.3% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-306 Missing Authentication for Critical Function Authentication
CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
flowiseaiflowise* <3.0.1

References 1

  • research.jfrog.com https://research.jfrog.com/vulnerabilities/flowise-os-command-remote-code-execution-jfsa-2025-001380578/
    ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.