CVE-2026-23847

SiYuan Vulnerable to Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon

CVSS 2.1 LOWEPSS 0.3%CWE-79

Vexday Risk Score

8Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 2.1EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

19 ene 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P

Productos afectados

siyuan-note · siyuan

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Referencias

https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777 https://github.com/siyuan-note/siyuan/issues/16844 https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93