CVEvulnerability

CVE-2025-59528

10.0 CRITICAL Published 2025-09-22 Modified 2026-10-18 Official page ↗
Status
Analyzed
Published
2025-09-22
Last modified
2026-10-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
10.0 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-94

Description

Flowise is a drag & drop user interface to build a customized large language model flow. In version 3.0.5, Flowise is vulnerable to remote code execution. The CustomMCP node allows users to input configuration settings for connecting to an external MCP server. This node parses the user-provided mcpServerConfig string to build the MCP server configuration. However, during this process, it executes JavaScript code without any security validation. Specifically, inside the convertToValidJSONString function, user input is directly passed to the Function() constructor, which evaluates and executes the input as JavaScript code. Since this runs with full Node.js runtime privileges, it can access dangerous modules such as child_process and fs. This issue has been patched in version 3.0.6.

Affected configurations

• flowiseai flowise 3.0.5

Related

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References