Executive brief
FUXA is an open-source SCADA/HMI visualization platform commonly used to monitor and control industrial control systems. An unauthenticated attacker can bypass all authentication mechanisms on FUXA instances with security enabled, obtain administrator privileges, and execute arbitrary code on the server. This could lead to full system compromise and expose connected industrial environments to attack.
Technical details
This vulnerability is an authentication bypass (CWE-287) that affects FUXA versions up to 1.2.9 when runtime.settings.secureEnabled is true. The flaw exists in the heartbeat refresh API endpoint, which does not properly validate authentication tokens and can be exploited by an unauthenticated remote attacker to mint administrator JWTs. No privileges, user interaction, or attack complexity are required. Once authenticated as admin, the attacker gains access to administrative APIs including automation and scripting features, allowing arbitrary code execution in the context of the FUXA service. The vulnerability is patched in version 1.2.10.
Affected products
- frangoteam FUXA <= 1.2.9
Timeline
- 2026-02-05: disclosed
- 2026-02-05: patched: version 1.2.10