CVE-2025-59434

Critical Multi-Tenant Variable Disclosure in Flowise Cloud via Custom JavaScript Function

State: Published
Severity: 9.6 Critical
Published: Sep 22, 2025
Updated: Sep 22, 2025
Reserved: Sep 15, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	9.6 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-284 Improper Access Control

Affected Products

Product	Versions
FlowiseFlowiseAI	< cloud-hosted (as of Aug 2025)Affected

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-435c-mg9p-fv22

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