SiYuan Knowledge Management XSS and Traversal

SiYuan personal knowledge management system versions 3.6.0 and below contain a path traversal vulnerability that allows authenticated attackers to exfiltrate arbitrary readable files from the system. An attacker with low-level privileges can exploit the /api/lute/html2BlockDOM endpoint to copy sensitive files to the workspace assets directory via malicious file:// links in pasted HTML, then retrieve them through the authenticated GET /assets/ endpoint. This is a critical vulnerability with a CVSS score of 9.9 due to its potential for high confidentiality impact and scope change, though no active exploitation (KEV) or public proof-of-concept has been documented.

SiYuan personal knowledge management system contains a cross-site scripting (XSS) vulnerability in versions 3.6.0 and below. An unauthenticated attacker can exploit the /api/icon/getDynamicIcon endpoint by crafting a malicious URL that bypasses SVG sanitization filters, allowing arbitrary JavaScript execution when a victim clicks an injected link within the rendered SVG. The CVSS score of 9.3 indicates critical severity, though exploitation requires user interaction (clicking a malicious link) and the attack complexity is low.