VDB

CVE-2026-23645

CVE-2026-23645 PUBLISHED CVSS 5.300000190734863 MEDIUM

SiYuan is self-hosted, open source personal knowledge management software. Prior to 3.5.4-dev2, a Stored Cross-Site Scripting (XSS) vulnerability exists in SiYuan Note. The application does not sanitize uploaded SVG files. If a user uploads and views a malicious SVG file (e.g., imported from an untrusted source), arbitrary JavaScript code is executed in the context of their authenticated session. This vulnerability is fixed in 3.5.4-dev2.

EPSS 0.02% · 5.4th percentile

Risk Scores

CVSS v4.0
5.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS Score
0.02%
5.4th percentile

Affected Products

VendorProductVersions
github.comsiyuan-note/siyuan/kernel0, 0
siyuan-notesiyuan< 3.5.4-dev2, < 3.5.4-dev2
b3logsiyuan0, 3.5.4, 3.5.4

Timeline

  • Jan 16, 2026 CVE Published
  • Jan 17, 2026 EPSS Score
  • Jan 17, 2026 PoC Published
  • Jan 18, 2026 PoC Published
  • Jan 19, 2026 PoC Published
  • Jan 20, 2026 EPSS Score
  • Jan 21, 2026 CVE Updated
  • Jan 23, 2026 EPSS Score
  • Jan 24, 2026 PoC Published
  • Jan 24, 2026 PoC Published
  • Jan 24, 2026 PoC Published
  • Jan 25, 2026 EPSS Score

References

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