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CVE-2026-28674

Danvei233 Xiaoheifs unrestricted file upload

7.2 HIGHPublic exploitEPSS 0.49%
  1. Published18 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Danvei233 Xiaoheifs< 0.4.0

Remediation

Fixed in
Danvei233 Xiaoheifs≥ 0.4.0

References

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Frequently asked

Is CVE-2026-28674 being actively exploited?

CVE-2026-28674 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.49%.

How severe is CVE-2026-28674?

CVE-2026-28674 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.49% probability of exploitation.

Which products are affected by CVE-2026-28674?

Affected products include Danvei233 Xiaoheifs.

How do I fix CVE-2026-28674?

Upgrade affected software to a fixed version, for example Danvei233 Xiaoheifs 0.4.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28674 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.