[Security] XSS leading to code execution

[thefLink]

Description
A XSS vulnerability exists that leads to arbitrary code execution

Version

• v1.0.4
• Tested on: Linux

To reproduce
Steps to reproduce the behavior:

1. Create a new project
2. Create a new Note with the value:

<img src="asdf" onerror="var os = require('os'); var hostname = os.platform(); var homedir = os.homedir(); alert('Host:' + hostname + 'directory: ' + homedir);">

4. See the popup
   

Expected behavior
This cross site scripting vulnerability allows an attacker to execute arbitrary code on the victims machine by creating a malicious note. In the worst case this will lead to a reverse shell. I am not going to paste the code for the reverse shell here for obvious reasons.

[IceEnd]

Hi, this software runs on a personal computer, XSS will only damage his own computer and will not affect others.

But given the security, I'll handle the preview HTML and make the software more secure.

Thanks very much!

[IceEnd]

Fixes. ver1.0.5