SiYuan

SiYuan is vulnerable to path traversal via double URL encoding in the `/export/` endpoint, bypassing an incomplete fix for CVE-2026-30869; an authenticated attacker can exploit this vulnerability to traverse directories and read arbitrary workspace files, including the SQLite database (`siyuan.db`), kernel log, and user documents due to a redundant `url.PathUnescape()` call in `serveExport()`.

SiYuan is vulnerable to zero-click NTLM hash theft on Windows and blind SSRF on all platforms due to insecure Mermaid.js configuration, where a malicious Mermaid diagram containing a protocol-relative URL can be injected into a note, causing the Electron client to fetch the URL, triggering SMB authentication on Windows and sending the victim's NTLMv2 hash to the attacker. On macOS and Linux, the request acts as a tracking pixel and blind SSRF.

SiYuan Note versions prior to the fix for commit f09953afc57a are vulnerable to reflected cross-site scripting (XSS) via a namespace prefix bypass in the SanitizeSVG function when handling dynamic icons, allowing unauthenticated attackers to execute arbitrary JavaScript in a victim's browser.

SiYuan versions prior to 3.6.2 are vulnerable to remote code execution (RCE) via a malicious website exploiting a permissive CORS policy to inject a JavaScript snippet, leading to arbitrary code execution within the application's Node.js context.

SiYuan note taking application is vulnerable to a directory traversal via the /api/file/readDir endpoint, which does not require authentication, allowing an attacker to enumerate the directory structure and retrieve file names, potentially leading to arbitrary document reading.

SiYuan is vulnerable to arbitrary document reading via the publishing service, allowing attackers to retrieve document IDs and view the content of all documents, including encrypted or prohibited ones, by exploiting the `/api/file/readDir` and `/api/block/getChildBlocks` interfaces.