CVE-2026-28674 xiaoheiFS Vulnerable to RCE via Arbitrary Payment Plugin Upload (Automatic Execution)
Attackers can achieve remote code execution by uploading malicious files to the payment plugin directory, which are automatically executed by a background watcher.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-28674?
CVE-2026-28674 is a high-severity vulnerability in danvei233 xiaoheiFS, published on 18 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-28674?
It affects 1 product.
Products include Danvei233 Xiaoheifs.
How do I fix CVE-2026-28674?
No fix has been published for CVE-2026-28674 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-28674 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28674 exists.