漏洞信息
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Vulnerability Title
Nextcloud MCP Server: Unauthenticated `POST /webhooks/nextcloud` allows arbitrary vector data deletion when `WEBHOOK_SECRET` is unset ( default )
Vulnerability Description
Nextcloud MCP Server is a production-ready MCP server that connects AI assistants to a Nextcloud instance. Prior to 0.117.2, the POST /webhooks/nextcloud endpoint in nextcloud_mcp_server/vector/webhook_receiver.py has no authentication by default because WEBHOOK_SECRET defaults to None and startup validation does not require it. When WEBHOOK_SECRET is unset, handle_nextcloud_webhook() accepts unauthenticated requests. The payload["user"]["uid"] field parsed in nextcloud_mcp_server/vector/webhook_parser.py is attacker-controlled and is used without an authenticated-session cross-check for Qdrant operations, allowing a network attacker to delete or trigger re-indexing of vector embeddings for any user and to destroy the semantic search index by sending forged deletion events. This issue is fixed in version 0.117.2.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Vulnerability Type
关键功能的认证机制缺失
Vulnerability Title
Chris Coutinho Nextcloud MCP Server 授权问题漏洞
Vulnerability Description
Chris Coutinho Nextcloud MCP Server是Chris Coutinho个人开发者的一个为人工智能助手提供云存储文件访问能力的服务器组件。 Chris Coutinho Nextcloud MCP Server 0.117.2之前版本存在授权问题漏洞,该漏洞源于WEBHOOK_SECRET默认设置为None且启动验证未要求认证,导致POST /webhooks/nextcloud端点接受未认证请求,且未对payload中的user uid字段进行认证会话交叉检查,可能导致网络攻
CVSS Information
N/A
Vulnerability Type
N/A