SiYuan has a SVG Sanitizer Bypass via `<animate>` Element — Unauthenticated XSS
Summary
SiYuan has a SVG Sanitizer Bypass via <animate> Element — Unauthenticated XSS
Original description
The description as published by the source.
SiYuan is a personal knowledge management system. Prior to 3.5.10, SiYuan's SVG sanitizer (SanitizeSVG) blocks dangerous elements (, , ) and removes on* event handlers and javascript: in href attributes. However, it does NOT block SVG animation elements (, ) which can dynamically set attributes to dangerous values at runtime, bypassing the static sanitization. This allows an attacker to inject executable JavaScript into the unauthenticated /api/icon/getDynamicIcon endpoint (type=8), creating a reflected XSS. This is a bypass of the fix for CVE-2026-29183 (fixed in v3.5.9). This vulnerability is fixed in v3.5.10.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov