CVE-2026-66395

Published: Lug 27, 2026 Last Modified: Lug 28, 2026

ExploitDB:

Other exploit source:

Google Dorks:

CRITICAL 9,4

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: passive

Confidentiality: N/A

Integrity: N/A

Availability: N/A

CRITICAL 9,6

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: required

Scope: changed

Confidentiality: high

Integrity: high

Availability: high

Description

AI Translation Available

SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Confidentiality Integrity Availability

Potential Impacts:

Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands

Applicable Platforms

Technologies: AI/ML, Web Based, Web Server

Likelihood of Exploit: High

View CWE Details

https://github.com/siyuan-note/siyuan/security/advisories/G…

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gx2-8gcr-x83f