{"id":"CVE-2026-43947","aliases":["GHSA-rg3m-cfq7-g6h6"],"url":"https://o3.security/vulnerability/CVE-2026-43947","summary":"FUXA Vulnerable to Unauthenticated Remote Code Execution via Script Test Mode Authorization Bypass","details":"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.","published":"2026-07-21T21:33:09.631Z","modified":"2026-08-12T03:51:15.252033628Z","cvss":null,"epss":{"score":0.00666,"percentile":0.48821,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"fuxa-server","fixedVersion":"1.3.1"}],"fix":{"url":"https://github.com/frangoteam/FUXA/commit/78534da61a91613712b44bb63c8d7da8c5df5ca4","label":"frangoteam/FUXA@78534da"},"references":[{"type":"WEB","url":"https://github.com/frangoteam/FUXA/releases/tag/v1.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43947.json"},{"type":"ADVISORY","url":"https://github.com/frangoteam/FUXA/security/advisories/GHSA-rg3m-cfq7-g6h6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43947"},{"type":"FIX","url":"https://github.com/frangoteam/FUXA/commit/78534da61a91613712b44bb63c8d7da8c5df5ca4"},{"type":"FIX","url":"https://github.com/frangoteam/FUXA/pull/2260"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.252033628Z"}}