frangoteam FUXA 1.3.0 Test Mode /api/runscript runScript test code injection

Summaryinfo

A vulnerability was found in frangoteam FUXA 1.3.0. It has been classified as critical. The impacted element is the function runScript of the file /api/runscript of the component Test Mode. The manipulation of the argument test leads to code injection. This vulnerability is listed as CVE-2026-43947. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in frangoteam FUXA 1.3.0. It has been rated as critical. This issue affects the function runScript of the file /api/runscript of the component Test Mode. The manipulation of the argument test with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. Version 1.3.0 has an unauthenticated Remote Code Execution vulnerability when `secureEnabled` is set to `true`. The `POST /api/runscript` endpoint checks authorization against the stored script's permission by ID, but when `test: true` is set in the request, it compiles and executes attacker-supplied code instead of the stored script's code. An unauthenticated attacker who knows a valid script ID and name may execute arbitrary code via test mode if at least one server-side script exists and is accessible without restrictive permissions. Script IDs and names can be obtained through the unauthenticated information disclosure in `GET /api/project` (reported separately). The only prerequisite is that at least one server-side script exists in the project. Version 1.3.1 fixes the issue.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-43947 since 05/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 1.3.1 eliminates this vulnerability.

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Productinfo

Vendor

• frangoteam

Name

• FUXA

Version

• 1.3.0

Website

• Product: https://github.com/frangoteam/FUXA/

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