FuseDOM is a development and demonstration tool that intentionally allows arbitrary HTML/JavaScript injection into web pages. This is the core functionality of the tool, but it comes with significant security implications.

Status: By Design

The tool intentionally allows writing arbitrary HTML content to DOM elements, including innerHTML. This is necessary for the filesystem-based DOM manipulation functionality.

Mitigation:

• Only use FuseDOM on web pages you own and control
• Never use on pages with sensitive user data
• Never use on production websites
• Only connect to trusted servers

Status: Needs Attention

The current implementation uses unencrypted WebSocket connections (ws://) without authentication.

Risks:

• Any local application can connect to the WebSocket server
• No authentication or authorization
• Traffic is not encrypted

Mitigation:

• Only run on localhost
• Use a firewall to block external access to the WebSocket port
• Consider implementing authentication if needed
• For production use, implement WSS (WebSocket Secure) with proper certificates

Status: Operating System Dependent

The mounted FUSE filesystem respects OS-level permissions, but any user with filesystem access can manipulate the DOM.

Risks:

• Other local users or processes could modify the DOM
• No fine-grained access control

Mitigation:

• Mount the filesystem with appropriate permissions
• Only run on single-user development machines
• Use OS-level access controls if needed

FuseDOM is intended for:

• ✅ Local development and testing
• ✅ Educational purposes
• ✅ Demonstration of FUSE concepts
• ✅ Automation of web page manipulation in controlled environments

FuseDOM is NOT intended for:

• ❌ Production websites
• ❌ Pages with sensitive user data
• ❌ Untrusted or third-party web pages
• ❌ Multi-user environments without proper isolation
• ❌ Publicly accessible services

1. Isolation: Run FuseDOM in isolated development environments
2. Network: Keep the WebSocket server on localhost only
3. Firewall: Block external access to the WebSocket port
4. Trust: Only use with HTML files you create and control
5. Monitoring: Monitor filesystem access to the mount point
6. Cleanup: Unmount the filesystem when not in use

If you discover a security vulnerability that is NOT by design (i.e., not the intentional HTML injection feature), please report it responsibly by opening a GitHub issue with the "security" label.

This tool is provided "as is" for educational and development purposes. Users are responsible for understanding the security implications and using the tool appropriately.