CriticalVulnerabilityLLM-specific
CVE-2025-59528: Flowise remote code execution through CustomMCP node configuration
- Source
- NVD(opens in a new tab)
- Identifier
- CVE-2025-59528
- Published
- Record updated
- Affected
- flowise = 3.0.5
- Fixed in
- 3.0.6
- released September 15, 2025, 7 days before disclosure
- Known exploitation
- Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
- EPSS
- 86.5%
Summary
Flowise version 3.0.5 is vulnerable to remote code execution through its CustomMCP node. The node parses the user-supplied mcpServerConfig string and passes it to the Function() constructor inside convertToValidJSONString, executing it as JavaScript with no security validation. Because this runs with full Node.js runtime privileges, the attacker can reach modules such as child_process and fs.
Mitigation
Fixed in version 3.0.6.
Affected packages in the Exposure Registry
Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.
- flowisenpmLLM dependency since 2024-03-12
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