Auth bypass in Flowise
CVE-2025-71327
Flowise contains an authentication bypass vulnerability in the unprotected /api/v1/account/register endpoint that allows unauthenticated attackers to create user accounts. Remote attackers can exploit this endpoint to register arbitrary accounts and authenticate to the system, gaining full API access without credentials.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Flowise — versions 3.0.1
- Flowiseai Flowise — versions 3.0.1
Weakness classification (CWE)
References
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-v5w9-prxf-w882 (Exploit, vendor-advisory, Vendor Advisory)
- www.vulncheck.com/advisories/flowise-authentication-bypass-via-unprotected-regi… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-71327?
- CVE-2025-71327 is a critical-severity vulnerability in Flowise, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2026-06-25.
- How severe is CVE-2025-71327?
- Critical severity. CVSS v3 base score is 9.1 out of 10.