Critical severity · published Jun 25, 2026
CVE-2025-71327
Flowise - Authentication Bypass via Unprotected Registration Endpoint
9.1
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · Flowise
3.0.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71327
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-71327
Exploit
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-v5w9-prxf-w882
Third Party Advisory
https://www.vulncheck.com/advisories/flowise-authentication-bypass-via-unprotected-registration-endpoint
More from Flowise
9.9
CVE-2026-56274
Flowise - Remote Code Execution via MCP Security Bypass in validateCommandFlags and validateArgsForLocalFileAccess
9.8
CVE-2026-56271
Flowise - Weak Default JWT Secrets in Authentication Middleware
9.8
CVE-2025-71338
Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API
9.8
CVE-2025-71336
Flowise - Unsandboxed Remote Code Execution via Custom MCP
9.8
CVE-2025-71334
Flowise - Arbitrary File Access via Missing Chat Flow ID Validation