CVE-2026-28674

High

Description

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.

SeverityHigh

CVSS7.2

Exploit probability—

ProductDanvei233 Xiaoheifs

PublishedMar 18, 2026

First seenMar 18, 2026

Weakness typeCWE-434Unrestricted upload of dangerous file type CWE-798Hard-coded credentials

How to fix

Update

danvei233 xiaoheifs0.4.0 or later

Affected products

Product	Affected versions	Fixed in
danvei233 xiaoheifs	v < 0.4.0	0.4.0

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