CVE-2026-33067CWE-79

SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata

Medium · published March 20, 2026

CVSS v4.0
5.3
EPSS
1%
Percentile
51.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00676 · 51.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-20T08:14Z
EPSS history
Timeline
  • 20 MAR 08:14Z
    SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata
    cvelistv5