CVE-2026-116167
SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameter
- State
- Published
- Severity
- 7.6 High
- Published
- Oct 25, 2026
- Updated
- Oct 26, 2026
- Reserved
- Oct 25, 2026
Description
SiYuan from 2.9.0 before 3.8.7 contains a cross-site scripting vulnerability in the unauthenticated /check-auth page that assigns the to parameter to window.location.href without scheme validation. Attackers can send a crafted link with a javascript: URI that executes after victim login, invoking kernel APIs to read or modify workspace content and settings.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-fmj3-xc2f-6w4w)vendor-advisory
- VulnCheck Advisory: SiYuan 2.9.0 before 3.8.7 XSS via check-auth to Parameterthird-party-advisory
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