Golang
CVE-2026-25647
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Stored XSS in Lute's Markdown rendering engine (versions 1.7.6 and earlier) allows authenticated attackers to inject malicious JavaScript into notes that executes when other users view the rendered content. SiYuan and other applications using vulnerable Lute versions are affected, with public exploit code available. A patch is available and should be applied to prevent session hijacking and credential theft.
Technical ContextAI
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Siyuan. 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.
RemediationAI
A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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