CVE-2026-28674: DANVEI233 Xiaoheifs

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

xiaoheiFS is a self-hosted financial and operational system for cloud service businesses. In versions up to and including 0.3.15, the `AdminPaymentPluginUpload` endpoint lets admins upload any file to `plugins/payment/`. It only checks a hardcoded password (`qweasd123456`) and ignores file content. A background watcher (`StartWatcher`) then scans this folder every 5 seconds. If it finds a new executable, it runs it immediately, resulting in RCE. Version 4.0.0 fixes the issue.

Affected products

• DANVEI233 Xiaoheifs: before 0.4.0 (fixed in 0.4.0)

Published 2026-03-18. Last modified 2026-06-17.