CVE-2026-47721 FUXA: Scheduler API missing admin check enables operator-to-admin escalation via scheduled device actions
Authenticated operators can escalate privileges to admin and execute server-side scripts by bypassing authorization checks in the scheduler API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47721?
CVE-2026-47721 is a medium-severity missing authorization vulnerability in frangoteam FUXA, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. Prior to 1.3.2, POST /api/scheduler and DELETE /api/scheduler in server/api/scheduler/index.js do not consistently enforce authJwt.haveAdminPermission for scheduler settings. An authenticated non-admin operator can create or alter deviceActions that invoke onSetValue or onRunScript, or delete schedules, gaining access to device-value changes and server-side project script execution normally reserved for administrators. Scheduled and repeating actions can continue changing PLC setpoints, safety interlocks, device state, or project data after the operator's session ends. This issue is fixed in version 1.3.2.
Weakness: CWE-862
Which versions are affected by CVE-2026-47721?
2 open source packages ship an affected version, including fuxa-server.
| Package | Affected | Fixed in |
|---|---|---|
fuxa-server npm | All versions to 1.1.14-1243 | None |
fuxa-server npm | All versions to 1.1.14-1243 | None |
How do I fix CVE-2026-47721?
No fix has been published for CVE-2026-47721 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47721 being exploited?
There is no known exploitation of CVE-2026-47721 in the wild and no public exploit code.
Sources
Also known as GHSA-8ghr-w65f-j3qr.