What’s Vulnerable › Vulnerabilities

CVE-2026-25647: Lute has a Stored Cross-Site Scripting (XSS) via Markdown hyperlink

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-06 · updated 2026-06-17
• Weakness: CWE-79

Description

Lute is a structured Markdown engine supporting Go and JavaScript. Lute 1.7.6 and earlier (as used in SiYuan before) has a Stored Cross-Site Scripting (XSS) vulnerability in the Markdown rendering engine. An attacker can inject malicious JavaScript into a Markdown text/note. When another user clicks the rendered content, the script executes in the context of their session.

Affected products

• siyuan-note siyuan: 3.5.4

References

• https://github.com/88250/lute/commit/0118e218916cf0cc7df639b50ce74e0c6c3d1868
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rw25-98wq-76qv

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