Is CVE-2025-59528 actively exploited?

CVE-2025-59528 has no public evidence of in-the-wild exploitation as of 2025-09-23.

What is the CVSS score for CVE-2025-59528?

CVE-2025-59528 has a CVSS score of 10 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

How do I patch CVE-2025-59528?

Patch guidance is available from flowiseai security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-59528.

Fix CVE-2025-59528 - CRITICAL flowiseai flowise

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-94 · Code Injection

Metadata

Primary Vendor: FLOWISEAI
Published: 9/22/2025
Last Modified: 9/23/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-59528

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary