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CVE-2025-59434— Critical Multi-Tenant Variable Disclosure in Flowise Cloud via Custom JavaScript Function

Quick assessment

Affected
FlowiseAI Flowise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise存在访问控制错误漏洞，该漏洞源于自定义JavaScript Function节点存在访问控制不当，可能导致跨租户数据泄露。

CVSS 9.6 · Critical EPSS 3.37% · P88

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-59434

Vulnerability Information
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Vulnerability Title
Critical Multi-Tenant Variable Disclosure in Flowise Cloud via Custom JavaScript Function
Source: CVE Program / CVE List V5
Vulnerability Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to August 2025 Cloud-Hosted Flowise, an authenticated vulnerability in Flowise Cloud allows any user on the free tier to access sensitive environment variables from other tenants via the Custom JavaScript Function node. This includes secrets such as OpenAI API keys, AWS credentials, Supabase tokens, and Google Cloud secrets — resulting in a full cross-tenant data exposure. This issue has been patched in the August 2025 Cloud-Hosted Flowise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Flowise 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise存在访问控制错误漏洞，该漏洞源于自定义JavaScript Function节点存在访问控制不当，可能导致跨租户数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
FlowiseAI Flowise < cloud-hosted (as of Aug 2025) -

II. Public POCs for CVE-2025-59434

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III. Intelligence Information for CVE-2025-59434

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Vendor Advisories for CVE-2025-59434 (1)

Same Patch Batch · FlowiseAI · 2025-09-22 · 3 CVEs total

CVE-2025-59528 10.0 CRITICAL Flowise has Remote Code Execution vulnerability
CVE-2025-59527 7.5 HIGH FlowiseAI/Flowise has Server-Side Request Forgery (SSRF) vulnerability

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-200

V. Comments for CVE-2025-59434

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