CVE-2025-59434 CRITICAL

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

Vendor Flowiseai

Product Flowise

Weakness CWE-200 · Info exposure

Published September 22, 2025

Last update September 22, 2025

View on NVD All CVEs

CVSS base score

9.6/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

What the vulnerability does

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.

Key dates

Disclosure timeline

September 22, 2025 CVE published

September 22, 2025 Record updated