What is CVE-2025-59434?

CVE-2025-59434 is a critical-severity vulnerability in Flowiseai Flowise, classified under Information Disclosure. CVSS score: 9.6/10. Published 2025-09-22.

How severe is CVE-2025-59434?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Is CVE-2025-59434 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Flowiseai Flowise

CVE-2025-59434

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 enviro…

Vulnerability class: Information Disclosure

EPSS: 0.001 (19.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Flowiseai Flowise — versions < cloud-hosted (as of Aug 2025)

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

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

Frequently asked questions

What is CVE-2025-59434?: CVE-2025-59434 is a critical-severity vulnerability in Flowiseai Flowise, classified under Information Disclosure. CVSS score: 9.6/10. Published 2025-09-22.
How severe is CVE-2025-59434?: Critical severity. CVSS v3 base score is 9.6 out of 10.
Is CVE-2025-59434 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.