Username Hash Found in WebSocket message

The 'Username Hash Found in WebSocket message' vulnerability means that the username or a related hash is being sent and exposed through WebSocket messages, which can be intercepted and exploited by attackers.

The 'Username Hash Found in WebSocket message' is a web application vulnerability. WebSocket vulnerabilities can be serious as they can expose sensitive information. Here's a detailed step-by-step manual on how to fix this issue:

Step 1: Understand the Vulnerability

Before fixing the vulnerability, it's crucial to understand it. The 'Username Hash Found in WebSocket message' vulnerability likely means that the username or a related hash is being sent in WebSocket messages, which can be intercepted and exploited by attackers. To fix this, we need to ensure that sensitive information is not exposed through WebSocket communication.

Step 2: Locate the Vulnerable Code

The next step is to locate the code where the vulnerability exists. This may involve reviewing your WebSocket implementation and identifying where usernames or hashes are being sent as part of WebSocket messages.

Step 3: Modify the WebSocket Implementation

To fix the vulnerability, you need to modify your WebSocket implementation. Here's how you can do it:

Example Vulnerable Code:

// Sending WebSocket message with username hash

const username = 'user123';

const hashedUsername = hash(username);

websocket.send(`User: ${hashedUsername}`);

Fixed Code:

// Sending WebSocket message without sensitive information

websocket.send('Hello, user!');

In the fixed code, we are sending a generic message to the WebSocket without exposing the username or its hash.

Step 4: Remove Unnecessary Data

Review your WebSocket messages and ensure that you are not sending unnecessary data. If the username or its hash is not required for a specific WebSocket communication, remove it.

Step 5: Implement Authentication

To enhance security, consider implementing proper authentication mechanisms for your WebSocket connections. This will ensure that only authenticated users can establish WebSocket connections and receive sensitive data.

Example Code for WebSocket Authentication:

const WebSocket = require('ws');

const wss = new WebSocket.Server({ noServer: true });

wss.on('connection', (ws) => {

  // Implement authentication here before proceeding

  if (!authenticateUser(ws)) {




  // Continue with WebSocket communication

  ws.send('You are now connected to the WebSocket server.');


Step 6: Encrypt Sensitive Data

If you must transmit sensitive data over WebSocket, ensure that it is encrypted using secure protocols like HTTPS or WSS (WebSocket Secure). This will protect the data from eavesdropping.

Step 7: Test Your Changes

After implementing the fixes, thoroughly test your WebSocket implementation to ensure that the vulnerability is no longer present. Use a combination of manual testing and automated security testing tools to validate your changes.

Step 8: Monitor and Maintain

Regularly monitor your web application for any potential vulnerabilities, including WebSocket-related issues. Stay updated with security best practices and keep your dependencies up-to-date to prevent future vulnerabilities.

Step 9: Documentation and Training

Document the changes you made to fix this vulnerability, and consider providing training for your development team on secure WebSocket communication practices to prevent similar issues in the future.

Step 10: Continuous Security

Security is an ongoing process. Regularly perform security assessments, code reviews, and penetration testing on your web application to identify and address new vulnerabilities as they arise.


The 'Username Hash Found in WebSocket message' vulnerability can be fixed by modifying your WebSocket implementation to avoid sending sensitive information, implementing proper authentication, encrypting data when necessary, and continuously monitoring and maintaining your application's security. By following these steps, you can mitigate the risk associated with this vulnerability and enhance the overall security of your web application.

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