QAnything 2.0.0 contains an authentication bypass vulnerability in the /api/localdocqa/getfilebase64 and /api/localdocqa/getdoc endpoints that allows unauthenticated attackers to access any uploaded file or document. Attackers can enumerate file identifiers through unauthenticated endpoints and retrieve base64-encoded files or parsed document chunks without ownership verification to disclose cross-tenant knowledge base content.

A Cross-Site Request Forgery (CSRF) vulnerability exists in the backend API of netease-youdao/qanything, as of commit d9ab8bc. The backend server has overly permissive CORS headers, allowing all cross-origin calls. This vulnerability affects all backend endpoints, enabling actions such as creating, uploading, listing, deleting files, and managing knowledge bases.