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Vulnerability · Published Jul 21, 2026 · Assigned by GitHub_M

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

High 8.9

In plain English

A high-severity incorrect authorization in FUXA from frangoteam. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.9High
Exploit odds (30 days)0.9%top 39.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmfuxa-server1.3.1GHSA-rg3m-cfq7-g6h6

Affected products (as reported)

VendorProductVersions
frangoteam FUXA = 1.3.0

Weakness: CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

References