CVE-2025-71334 PoC — Flowise - Arbitrary File Access via Missing Chat Flow ID Validation

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-71334.yaml

Associated Vulnerability

Title: Flowise - Arbitrary File Access via Missing Chat Flow ID Validation (CVE-2025-71334)
Description:Flowise before 3.0.6 (affected versions 2.2.8 and earlier) contains an arbitrary file access vulnerability due to missing validation that the chatflowId and chatId parameters are UUIDs or numbers in file handling operations. By supplying a path-traversal value (e.g., '../../../../../tmp') as the chatflow id, an unauthenticated attacker can use the /api/v1/chatflows endpoint (via addBase64FilesToStorage) to write arbitrary files, and the /api/v1/get-upload-file and /api/v1/openai-assistants-file/download endpoints (via streamStorageFile) to read arbitrary files. Arbitrary file write may lead to remote code execution.

Description

Flowise <= 2.2.8 contains a path traversal vulnerability caused by missing validation of chatflowId and chatId parameters in file handling, letting unauthenticated attackers read and write arbitrary files, exploit requires no authentication.

File Snapshot

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