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TI-2026-25509 Aliases CVE-2026-33067GHSA-mvpm-v6q4-m2pf

SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata

Priority MEDIUM 57CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00572 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed siyuan (siyuan-note): 3.6.1github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260317012524-fe4523fff2c8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
siyuan-notesiyuanbefore 3.6.13.6.1Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260317012524-fe4523fff2c80.0.0-20260317012524-fe4523fff2c8Patch availableGHSA-mvpm-v6q4-m2pf
  • siyuan Vendorsiyuan-note Affected before 3.6.1 Fixed in 3.6.1 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260317012524-fe4523fff2c8 Fixed in 0.0.0-20260317012524-fe4523fff2c8 Patch available GHSA-mvpm-v6q4-m2pf

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*before 3.6.1Vulnerablesiyuan-note
  • cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions before 3.6.1 Vulnerable ·siyuan-note

Remediation

  • Fix · CNA siyuan (siyuan-note) Fixed in 3.6.1
  • Fix · GHSA-mvpm-v6q4-m2pf github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260317012524-fe4523fff2c8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33067
  2. 2026-10-03 Alias added: GHSA-mvpm-v6q4-m2pf
  3. 2026-10-14 EPSS moved to the 50th–90th percentile
  4. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
  • TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8
  • TI-2024-35827 A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. CVSS 3.1CRITICAL 9.8
  • TI-2024-35826 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. CVSS 3.1CRITICAL 9.8
  • TI-2024-35825 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. CVSS 3.1CRITICAL 9.8
  • TI-2024-35824 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. CVSS 3.1CRITICAL 9.8
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences