Flowise - Arbitrary File Upload via Unauthenticated /api/v1/attachments Endpoint | Advisories

Advisories

Flowise - Arbitrary File Upload via Unauthenticated /api/v1/attachments Endpoint

severity: critical
date: 6/25/2026
Affecting: Flowise <= 2.2.4
CVE: CVE-2025-71333
CWE: CWE-73 External Control of File Name or Path
CVSS: 9.3
CVSS V4 Vector: 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
References: GitHub Security Advisory (GHSA-h42x-xx2q-6v6g)
Credit: dorattias
Description: Flowise through 2.2.4 contains an unauthenticated arbitrary file upload vulnerability in the /api/v1/attachments endpoint when storageType is set to local. Attackers can exploit path traversal in the chatId and chatflowId parameters to upload malicious files to arbitrary directories, potentially enabling remote code execution and server compromise.

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