--- title: "CVE-2025-59528: Flowise has Remote Code Execution… | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2025-59528 --- # CVE-2025-59528: Flowise has Remote Code Execution… | CubePath ## 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. Official description from the CVE record, published by GitHub\_M. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-59528) ## Key data ### CVSS 3.1 Critical 10.0 Score published by GitHub\_M in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.86975 (87.0% probability) Percentile 99.7% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of Sep 22, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Public proof of concept recorded by CISA Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-94](https://cwe.mitre.org/data/definitions/94.html) Improper Control of Generation of Code ## Affected products Products listed in the CVE record, as the CNA published them. - FlowiseAI Flowise - affected: = 3.0.5 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [github.com/FlowiseAI/Flowise/security/advisories/GHSA-3gcm-…](https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3gcm-f6qx-ff7p) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L132) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L220) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/components/nodes/tools/MCP/CustomMCP/CustomMCP.ts#L262-L270) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/controllers/nodes/index.ts#L57-L78) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/routes/node-load-methods/index.ts#L5) - [github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae8…](https://github.com/FlowiseAI/Flowise/blob/5930f1119c655bcf8d2200ae827a1f5b9fec81d0/packages/server/src/services/nodes/index.ts#L91-L94) - [github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.6](https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.0.6) ## Timeline 1. ID reserved Sep 17, 2025 2. Record published Sep 22, 2025 3. Record last updated Sep 22, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)