[Bounty] Tronscan V2 - Private/Account Key - Able to create/view multiple wallets without going to register/login page

[robincarlo84]

Bug Report

By changing the account key stored on the browser local storage, it seems that it creates a new wallet or logged in on an existing one.

This screenshot above is a newly created wallet by just changing few characters of the account key.

You can reproduce this by:

1. Open Browser's developer tools
2. Go to Application tab
3. Open the Local Storage by double clicking it
4. Click "https://tronscan.org/"
5. Look for "account_key" then change one or two characters. - Don't change "data" and "{}" text
6. Reload the page

Tested OS

Mac

Browser

Chrome
FF
Safari

Suggested fix

Having the Private/Account key stored on the browser local storage is not advisable, due to:

1. XSS vulnerability
2. When someone uses the site and leaves the wallet logged in, someone would just quickly get the key in just a few seconds without leaving a trace.
   Which is why on some sites profile page, "password" is hidden. Though this a rare case, but prevention is always better than cure.

Personal solution would be is to generate a long random string and store it to the database along with an expiry date. Then match the current string stored on the local storage vs the one on the Database and if it did then it's considered the user as logged in.

This way you won't be exposing the user's Private/Account key. And in case of any XSS injections, you won't be needing to ask all the users to force reset their Private/Account key - not sure if reseting is possible.

Reward Information

Voluntary donation: 0x6562eb37a210a0949fd502f2a746284a38f4e9cc
Email: robincarlo84@gmail.com