CVE-2025-59434: Critical Multi-Tenant Variable Disclosure in Flowise Cloud via Custom JavaScript Function
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-59434?
CVE-2025-59434 is considered a high severity vulnerability due to its potential to expose sensitive information.
How do I fix CVE-2025-59434?
To remediate CVE-2025-59434, ensure that you upgrade to a secure version of Flowise Cloud-Hosted Flowise released after August 2025.
What type of vulnerability is CVE-2025-59434?
CVE-2025-59434 is an authenticated access vulnerability that affects users on the free tier of Flowise Cloud.
Who is affected by CVE-2025-59434?
Any user utilizing the free tier of Flowise Cloud-Hosted Flowise prior to August 2025 is affected by CVE-2025-59434.
What are the potential impacts of CVE-2025-59434?
CVE-2025-59434 could allow unauthorized users to access sensitive environment variables from other tenants.