CVE-2026-25647

Name: CVE-2026-25647
Creator: NVD / NIST
Published: 2026-02-06T19:16:09.593+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-25647 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.20%

10.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
B3log	Siyuan	3.5.4

References

https://github.com/88250/lute/commit/0118e218916cf0cc7df639b50ce74e0c6c3d1868Patch
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-rw25-98wq-76qvExploit, Vendor Advisory

Timeline

Published: Feb 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-25647?

How severe is CVE-2026-25647?

CVE-2026-25647 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-25647?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-25647?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST