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CVE-2025-71331— Flowise - Cross-Site Scripting in Chat Messages and Agent Workflows

Quick assessment

Affected
Flowise Flowise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.0.8之前版本存在跨站脚本漏洞，该漏洞源于对聊天消息和自定义代理函数中的输入过滤不足，可能导致攻击者通过发送iframe有效载荷或让自定义代理函数从外部网站返回XSS有效载荷来注入恶意JavaScript脚本，从而窃取Cookie和会话数据。

CVSS 6.1 · Medium EPSS 0.33% · P23

Affected Version Matrix 2

VendorProduct Version RangeStatus
Flowise Flowise < 3.0.8 affected
3.0.8 unaffected
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I. Basic Information for CVE-2025-71331

Vulnerability Information
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Vulnerability Title
Flowise - Cross-Site Scripting in Chat Messages and Agent Workflows
Source: CVE Program / CVE List V5
Vulnerability Description
Flowise before 3.0.8 contains a cross-site scripting (XSS) vulnerability caused by insufficient input filtering in chat messages and custom agent functions. An attacker can inject malicious JavaScript by sending an iframe payload (e.g., <iframe src="javascript:alert(document.cookie)">) in a chat box, or by having a custom agent function return an XSS payload from an external website. The injected script executes in the victim's browser, enabling theft of cookies and session data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
FlowiseAI Flowise 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlowiseAI Flowise是FlowiseAI公司开源的一个用于轻松构建 LLM 应用程序的工具。 FlowiseAI Flowise 3.0.8之前版本存在跨站脚本漏洞，该漏洞源于对聊天消息和自定义代理函数中的输入过滤不足，可能导致攻击者通过发送iframe有效载荷或让自定义代理函数从外部网站返回XSS有效载荷来注入恶意JavaScript脚本，从而窃取Cookie和会话数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Flowise Flowise 0 ~ 3.0.8 -

II. Public POCs for CVE-2025-71331

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III. Intelligence Information for CVE-2025-71331

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Vendor Advisories for CVE-2025-71331 (2)

Same Patch Batch · Flowise · 2026-06-20 · 4 CVEs total

CVE-2024-58351 9.8 CRITICAL Flowise - Remote Code Execution via overrideConfig Parameter
CVE-2026-56276 Flowise - Mass Assignment in PUT /api/v1/user Allows Password Hash Override
CVE-2026-56267 Flowise - PII Disclosure via Unauthenticated Forgot Password Endpoint

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: Flowise
Same weakness: CWE-80

V. Comments for CVE-2025-71331

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