What is CVE-2024-55660?

CVE-2024-55660 is a critical-severity vulnerability in B3log Siyuan, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.8/10. Published 2024-12-12.

How severe is CVE-2024-55660?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in B3log Siyuan

CVE-2024-55660

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.

Published 2024-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

B3log Siyuan — versions 3.1.15
Siyuan-Note Siyuan — versions < 3.1.16

Weakness classification (CWE)

References

github.com/siyuan-note/siyuan/security/advisories/GHSA-4pjc-pwgq-q9jp (Vendor Advisory)
github.com/siyuan-note/siyuan/commit/e70ed57f6e4852e2bd702671aeb8eb3a47a36d71 (Patch)

Frequently asked questions

What is CVE-2024-55660?: CVE-2024-55660 is a critical-severity vulnerability in B3log Siyuan, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.8/10. Published 2024-12-12.
How severe is CVE-2024-55660?: Critical severity. CVSS v3 base score is 9.8 out of 10.