Description
SiYuan before v3.7.4 contains a cross-site scripting vulnerability in the file upload validation flow that fails to escape filenames before inserting them into HTML via insertAdjacentHTML. Attackers can craft a malicious filename containing script payloads that execute with full OS command access when a user drags, drops, or pastes the file into the editor.
CVSS 8.6EPSS 0.147%Risk 0.87
View source- Published
- 2026-08-18 12:19:30
- Affected versions
- <3.7.4
- Type
- Web application
- Last modified
- 2026-08-26 17:04:11
- Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H