CVE-2026-65605 PUBLISHED

SiYuan before v3.7.2 Stored XSS to RCE via Attribute View

Assigner: VulnCheck
Reserved: 22.07.2026 Published: 23.07.2026 Updated: 23.07.2026

SiYuan before v3.7.2 contains a stored cross-site scripting vulnerability in Attribute View (database) cell rendering. A Template column value is rendered as HTML via text/template without auto-escaping, and EscapeHTML is only applied when HasUnclosedHtmlTag returns true; because balanced self-closing tags such as <img> are skipped by that check, a payload like <img src=x onerror=...> is stored unescaped and later inserted into the page via innerHTML, executing when the database is viewed. Because the desktop renderer runs with nodeIntegration enabled, the injected script can reach require and escalate to arbitrary command execution.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.4

Product Status

Vendor siyuan-note
Product siyuan
Versions Default: unaffected
  • affected from 0 to 3.7.2 (excl.)
  • Version 3.7.2 is unaffected

Credits

  • hyuunnn reporter

References

Problem Types

  • Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE