SB2025031350 - Arbitrary file upload in Flowise

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Main Vulnerability Database SB2025031350

SB2025031350 - Arbitrary file upload in Flowise

Published: March 13, 2025 Updated: May 4, 2026

Security Bulletin ID SB2025031350
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Arbitrary file upload (CVE-ID: N/A)

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to upload arbitrary files.

The vulnerability exists due to unrestricted file upload in the /api/v1/attachments endpoint when handling unauthenticated file upload requests with attacker-controlled path parameters. A remote attacker can send a specially crafted request to upload arbitrary files.

The issue is exposed only when the storageType setting is configured as local, which is the default configuration.


Remediation

Install update from vendor's website.

References