CVSS 4.0
5.3 mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:NCVE-2026-33067
Medium (5.3) in b3log siyuan. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in github.com/siyuan-note/siyuan/kernel 0.0.0-20260317012524-fe4523fff2c8.
SiYuan is a personal knowledge management system. Versions 3.6.0 and below render package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan's Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim's operating system — with zero user interaction beyond opening the marketplace tab. This issue has been fixed in version 3.6.1.
Severity
CVSS 3.1
9.0 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
- CWE
- CWE-79
- Published
- Modified
- Record from
- the NVD, synced
Affected
- b3log:siyuan
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mvpm-v6q4-m2pf | Go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260317012524-fe4523fff2c8 | 0.0.0-20260317012524-fe4523fff2c8 |
| GO-2026-4747 | Go | github.com/siyuan-note/siyuan/kernel | <0.0.0-20260317012524-fe4523fff2c8 | 0.0.0-20260317012524-fe4523fff2c8 |