CVE-2026-23852 SiYuan vulnerable to Stored XSS / RCE via `setBlockAttrs` icon attribute

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 have a stored Cross-Site Scripting XSS vulnerability that allows an attacker to inject arbitrary HTML attributes into the icon attribute of a block via the /api/attr/setBlockAttrs API. The payload is later rendered in the...

CVE-2026-23852

SiYuan up to version 3.5.4 is vulnerable to a stored XSS via the icon attribute in blocks created through the /api/attr/setBlockAttrs API. The payload is rendered unsanitized within the dynamic icon feature, enabling stored XSS and, on desktop, potential RCE. The issue bypassed a prior fix for is...

CVE-2026-23852

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 have a stored Cross-Site Scripting XSS vulnerability that allows an attacker to inject arbitrary HTML attributes into the icon attribute of a block via the /api/attr/setBlockAttrs API. The payload is later rendered in the...

CVE-2026-23852 SiYuan vulnerable to Stored XSS / RCE via `setBlockAttrs` icon attribute

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 have a stored Cross-Site Scripting XSS vulnerability that allows an attacker to inject arbitrary HTML attributes into the icon attribute of a block via the /api/attr/setBlockAttrs API. The payload is later rendered in the...

SiYuan code injection vulnerability

SiYuan is a privacy-oriented personal knowledge management system developed by SiYuan. Versions of SiYuan prior to 3.5.4 contained a code injection vulnerability. This vulnerability stemmed from the/api/attr/setBlockAttrs API, which allowed attackers to inject arbitrary HTML attributes into the...