Vulnerability in fuxa-server (CVE-2026-47721)
Summary
Vulnerability in fuxa-server (CVE-2026-47721). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/scheduler.
Original description
The description as published by the source.
Summary
An authorization issue in the Scheduler API allowed authenticated non-admin users to create or modify scheduled actions that should be restricted to administrators.
Details
The Scheduler API did not correctly enforce administrator permissions when processing scheduler modifications.
As a result, authenticated users with non-administrative roles could create or modify scheduled actions that execute privileged operations, including device value changes and server-side script execution.
The issue was fixed in version 1.3.2 by enforcing the appropriate permission checks for scheduler modifications.
Impact
An operator-level user in FUXA reaches the PLC-write and server-side-script-execution surface that the platform otherwise restricts to administrators. In a SCADA deployment those two privileges cover setpoint control and the automation scripting engine. Alice schedules a job that rewrites a pump's enable tag, opens a safety interlock, or runs a project script that walks the device tree. The scheduled-action model extends the attack: Alice does not need to keep a session open for the action to fire, and a repeating schedule re-applies her changes every cycle even if an admin reverts them manually.
CVSS 3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L (Medium, 6.3). CWE-862.
Recommended Fix
Add authJwt.haveAdminPermission(permission) to both POST /api/scheduler and DELETE /api/scheduler, matching every other write endpoint that reaches `runtime.de…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-47721 has been found in fuxa-server.
Attackers can target a specific entry point like POST /api/scheduler over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "fuxa-server CVE-2026-47721" on the vendor's site.
CVE-2026-47721 (fuxa-server) — CWE-862 / CVSS v3 6.3
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/scheduler / DELETE /api/scheduler / runtime.devices.setTagValue / runtime.scriptsMgr.runScript
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-862) exists in fuxa-server. Attackers reach the vulnerable code path via POST /api/scheduler.
Check the vendor advisory for the affected versions of fuxa-server. Attack surface: POST /api/scheduler / DELETE /api/scheduler / runtime.devices.setTagValue / runtime.scriptsMgr.runScript.
Severity: Medium (CVSS 6.3/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/scheduler requests with malformed payloads or SQL meta-characters. Run grep -r 'fuxa-server' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'fuxa-server' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
fuxa-serverを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/scheduler' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/schedulerへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Post-deployment verification verify
Replay attack against POST /api/scheduler on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。