siyuan-note SiYuan up to 3.7.1 Bazaar Plugin Readme plugin name cross site scripting

Summaryinfo

A vulnerability has been found in siyuan-note SiYuan up to 3.7.1 and classified as problematic. This impacts an unknown function of the component Bazaar Plugin Readme Handler. This manipulation of the argument plugin name causes cross site scripting. This vulnerability is handled as CVE-2026-66395. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in siyuan-note SiYuan up to 3.7.1. Affected by this vulnerability is an unknown part of the component Bazaar Plugin Readme Handler. The manipulation of the argument plugin name with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-66395 since 07/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 3.7.2 eliminates this vulnerability.

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Productinfo

Vendor

• siyuan-note

Name

• SiYuan

Version

• 3.7.0
• 3.7.1

Website

• Product: https://github.com/siyuan-note/siyuan/

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CPE 2.2info

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