Stored XSS Vulnerability in Lute Markdown Engine for SiYuan Users
CVE-2026-25647

4.6MEDIUM

Key Information:

Vendor

Siyuan-note

Status
Siyuan
Vendor
CVE Published:
6 February 2026

What is CVE-2026-25647?

The Lute Markdown engine, utilized in SiYuan, has a vulnerability that allows attackers to perform Stored Cross-Site Scripting (XSS). In versions 1.7.6 and earlier, an attacker can craft malicious Markdown content that, when rendered, executes harmful JavaScript in the context of another user's session. This vulnerability poses a significant risk as it can lead to unauthorized actions and data breaches for unsuspecting users.

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Deploy the Patch

Affected Version(s)

siyuan < 3.5.5

References

https://github.com/siyuan-note/siyuan/security/advisories...
x_refsource_CONFIRM
https://github.com/88250/lute/commit/0118e218916cf0cc7df6...
x_refsource_MISC

CVSS V3.1

Score:
4.6
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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