CVE-2025-54782: Nestjs Devtools-integration RCE Vulnerability

CVE-2025-54782 Overview

CVE-2025-54782 is a critical Remote Code Execution (RCE) vulnerability discovered in the @nestjs/devtools-integration package, a component of the popular Nest framework for building scalable Node.js server-side applications. In versions 0.2.0 and below, the package exposes a local development HTTP server with an API endpoint that uses an unsafe JavaScript sandbox implementation. Due to improper sandboxing and missing cross-origin protections, any malicious website visited by a developer can execute arbitrary code on their local machine.

The vulnerability specifically affects the /inspector/graph/interact endpoint, which accepts JSON input containing a code field and executes the provided code in a Node.js vm.runInNewContext sandbox. This sandbox implementation is fundamentally flawed, as the Node.js vm module is explicitly documented as not being a security mechanism.

Critical Impact

Attackers can achieve full remote code execution on developer workstations by tricking them into visiting a malicious website while running a NestJS application with devtools integration enabled.

Affected Products

• NestJS devtools-integration versions 0.2.0 and below

Discovery Timeline

• 2025-08-02 - CVE CVE-2025-54782 published to NVD
• 2025-10-09 - Last updated in NVD database

Technical Details for CVE-2025-54782

Vulnerability Analysis

This vulnerability represents a Command Injection weakness (CWE-77) where arbitrary code can be executed through an improperly secured development endpoint. The @nestjs/devtools-integration package adds HTTP endpoints to a locally running NestJS development server intended for debugging purposes. The core issue stems from the use of Node.js's vm.runInNewContext as a security boundary, which it was never designed to be.

When enabled, the devtools integration creates an HTTP server that accepts requests at the /inspector/graph/interact endpoint. This endpoint parses incoming JSON payloads and extracts a code field, which is then executed within what appears to be a sandboxed environment. However, the vm module in Node.js provides only contextual isolation, not security isolation—meaning attackers can easily escape the sandbox and access the main process context.

Compounding this issue is the absence of cross-origin protections on the HTTP endpoint. Without proper CORS restrictions, any website can make requests to the local development server, enabling cross-origin attacks where a malicious webpage can execute arbitrary code on the developer's machine.

Root Cause

The root cause of this vulnerability is twofold. First, the package relies on vm.runInNewContext for code execution isolation, which the Node.js VM API Documentation explicitly warns against using for security purposes. Second, the HTTP endpoint lacks Cross-Origin Resource Sharing (CORS) protections, allowing any external website to interact with the local development server and submit malicious code for execution.

Attack Vector

The attack requires network-adjacent access, where an attacker can reach the local development server. The most practical attack scenario involves a developer visiting a malicious website while their NestJS application with devtools integration is running. The malicious website can then make cross-origin HTTP requests to the local endpoint, submitting arbitrary JavaScript code that escapes the ineffective sandbox and executes with the full privileges of the Node.js process.

The attacker sends a crafted JSON payload to the /inspector/graph/interact endpoint containing JavaScript code designed to break out of the vm sandbox. Once escaped, the attacker gains full control over the developer's machine with the same privileges as the Node.js process.

Detection Methods for CVE-2025-54782

Indicators of Compromise

• Unexpected HTTP requests to /inspector/graph/interact endpoint from external origins
• Network connections from Node.js processes to unusual external IP addresses
• Unusual child processes spawned by the Node.js development server
• Suspicious file system modifications in the developer's home directory or project folders

Detection Strategies

• Monitor web server logs for requests to /inspector/graph/interact with unusual payloads or external referer headers
• Implement network traffic analysis to detect cross-origin requests to local development servers
• Use endpoint detection tools to identify unexpected process spawning from Node.js applications
• Deploy SentinelOne Singularity to detect and alert on anomalous process behaviors and code execution patterns

Monitoring Recommendations

• Enable verbose logging on development servers to capture all incoming requests and their origins
• Monitor for child processes spawned by Node.js that execute system commands
• Track outbound network connections from development environments for data exfiltration attempts
• Implement browser security extensions that restrict cross-origin requests to localhost

How to Mitigate CVE-2025-54782

Immediate Actions Required

• Upgrade @nestjs/devtools-integration to version 0.2.1 or later immediately
• Disable devtools integration in any environment accessible from untrusted networks
• Audit your package.json and package-lock.json for vulnerable versions of the affected package
• Review development server configurations to ensure they are not exposed beyond localhost

Patch Information

The vulnerability has been fixed in version 0.2.1 of the @nestjs/devtools-integration package. The fix addresses both the unsafe sandbox implementation and adds proper cross-origin protections to prevent malicious websites from exploiting the endpoint. Users should update their dependencies immediately by running their package manager's update command. See the GitHub Security Advisory for complete details on the fix.

Workarounds

• Completely remove or disable the @nestjs/devtools-integration package until you can upgrade
• Configure firewall rules to block external access to development server ports
• Use browser profiles without saved sessions for untrusted web browsing while developing
• Implement a reverse proxy with strict CORS policies in front of development servers

# Upgrade to patched version
npm update @nestjs/devtools-integration

# Or explicitly install the fixed version
npm install @nestjs/devtools-integration@0.2.1

# Verify installed version
npm list @nestjs/devtools-integration