CVE-2024-55660: b3log Siyuan

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

SiYuan is a personal knowledge management system. Prior to version 3.1.16, SiYuan's `/api/template/renderSprig` endpoint is vulnerable to Server-Side Template Injection (SSTI) through the Sprig template engine. Although the engine has limitations, it allows attackers to access environment variables. Version 3.1.16 contains a patch for the issue.

Affected products

• b3log Siyuan: version 3.1.15 only

Published 2024-12-12. Last modified 2026-06-17.