CVE-2026-43947: FUXA Vulnerable to Unauthenticated Remote Code Execution via Script Test Mode Authorization Bypass

An unauthenticated Remote Code Execution vulnerability exists in FUXA 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.