CVE-2025-69983: FUXA v1.2.7 RCE Vulnerability

CVE-2025-69983 Overview

CVE-2025-69983 is a Remote Code Execution (RCE) vulnerability affecting FUXA v1.2.7, an open-source web-based SCADA/HMI system. The vulnerability exists in the project import functionality, where the application fails to properly sanitize or sandbox user-supplied scripts within imported project files. An attacker can exploit this flaw by uploading a malicious project containing system commands, potentially leading to full system compromise.

Critical Impact

Successful exploitation allows attackers to execute arbitrary system commands on the underlying server, enabling complete system takeover, data exfiltration, and lateral movement within the network.

Affected Products

• FUXA v1.2.7
• Earlier versions of FUXA may also be affected

Discovery Timeline

• 2026-02-03 - CVE-2025-69983 published to NVD
• 2026-02-04 - Last updated in NVD database

Technical Details for CVE-2025-69983

Vulnerability Analysis

This vulnerability is classified as a Remote Code Execution (RCE) flaw stemming from improper input validation in FUXA's project import functionality. FUXA is designed to allow users to import and export project configurations, which can include scripts for automation and control logic. The core issue lies in the application's failure to implement proper sanitization or sandboxing mechanisms for user-supplied scripts embedded within these project files.

When a project file is imported, the application processes the contained scripts without adequately validating or restricting their content. This design oversight allows an attacker to craft a malicious project file containing embedded system commands or code that will be executed in the context of the FUXA server process.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of sandboxing for imported project scripts. The project import API, located in the FUXA Project API, processes user-supplied project data without adequately restricting the execution context of embedded scripts. This allows arbitrary code embedded in project files to be executed with the privileges of the FUXA server process.

Attack Vector

The attack vector involves an authenticated or potentially unauthenticated attacker (depending on FUXA configuration) uploading a specially crafted project file through the application's import functionality. The malicious project file contains embedded scripts with system commands. Upon import, these commands are executed on the server, granting the attacker the ability to:

1. Execute arbitrary operating system commands
2. Read or modify sensitive files on the server
3. Establish persistent backdoor access
4. Pivot to other systems on the network
5. Disrupt industrial control operations if FUXA is connected to physical systems

The vulnerability is particularly concerning given FUXA's use case as a SCADA/HMI system, where compromise could have implications for industrial control systems and critical infrastructure.

Detection Methods for CVE-2025-69983

Indicators of Compromise

• Unexpected project import activities in FUXA application logs
• Anomalous process spawning from the FUXA server process (e.g., shell processes, network utilities)
• Unusual outbound network connections originating from the FUXA server
• Modifications to system files or creation of new user accounts on the FUXA host

Detection Strategies

• Monitor FUXA application logs for project import events from unexpected sources or at unusual times
• Implement file integrity monitoring on the FUXA server to detect unauthorized changes
• Deploy endpoint detection and response (EDR) solutions to identify suspicious command execution patterns
• Review network traffic for data exfiltration attempts or command-and-control communications

Monitoring Recommendations

• Enable detailed logging for all FUXA API endpoints, particularly project import/export functions
• Configure alerts for any child process spawning from the Node.js process running FUXA
• Monitor for unusual file system access patterns by the FUXA server process
• Implement network segmentation to limit the impact of a potential compromise

How to Mitigate CVE-2025-69983

Immediate Actions Required

• Restrict access to the FUXA project import functionality to trusted administrators only
• Implement network segmentation to isolate FUXA servers from critical systems
• Review access control configurations to ensure proper authentication is enforced
• Audit recent project imports for signs of malicious content

Patch Information

At the time of publication, no official patch information has been provided by the vendor. Organizations should monitor the official FUXA GitHub repository for security updates and apply patches as soon as they become available.

Workarounds

• Disable the project import functionality if not actively required for operations
• Implement a web application firewall (WAF) to inspect and filter project upload requests
• Run the FUXA application in a containerized or sandboxed environment to limit the impact of potential exploitation
• Apply the principle of least privilege to the user account running the FUXA service

Organizations should prioritize updating FUXA to a patched version when available and implement the above workarounds as interim protective measures.