Dify MCP OAuth Flow Vulnerable to XSS

Dify is an LLM application development platform. In Dify versions through 1.9.1, the MCP OAuth component is vulnerable to cross-site scripting when a victim connects to an attacker-controlled remote MCP server. The vulnerability exists in the OAuth flow implementation where the authorization_url provided by a remote MCP server is directly passed to window.open without validation or sanitization. An attacker can craft a malicious MCP server that returns a JavaScript URI (such as javascript:alert(1)) in the authorization_url field, which is then executed when the victim attempts to connect to the MCP server. This allows the attacker to execute arbitrary JavaScript in the context of the Dify application.

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在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Dify 跨站脚本漏洞

dify是LangGenius开源的一个开源的 LLM 应用程序开发平台。 Dify 1.9.1及之前版本存在跨站脚本漏洞，该漏洞源于OAuth流程实现中未验证或清理authorization_url，可能导致跨站脚本攻击。

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