Description
SiYuan versions before 3.8.4 fail to escape bookmark labels imported from notebook files when rendering them in the dock tree. Attackers can craft malicious .sy notebook files with unescaped HTML in bookmark attributes that execute scripts in the Electron renderer with access to child_process for command execution.
References6
- github.com/siyuan-note/siyuan
- github.com/siyuan-note/siyuan/blob/v3.8.3/app/src/util/Tree.ts#…
- github.com/siyuan-note/siyuan/commit/6f093ebe50afc503e2a8b05616…
- github.com/siyuan-note/siyuan/security/advisories/GHSA-jhfc-9mc…
- www.vulncheck.com/advisories/siyuan-before-3.8.4-cross-site-scr…
- github.com/siyuan-note/siyuan/security/advisories/GHSA-jhfc-9mc…
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 4.0
-
8.6
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 57 · as of 8 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.