[BUG] Shop vouchers injection flaw

[wildmaster84]

Using a json format such as {\n gives 100% off on any shop item.

The voucher discount system allows code injection.

To Reproduce | Pour reproduire le bug
go to your /shop and for the voucher code use "{\n" and click purchase.

Steps to reproduce the behavior: | Étapes pour reproduire le bug :

1. Go to '/shop'

2. Click on 'Shop item'

3. Scroll down to 'text box below price'

4. Enter '{\n' and click purchase

Expected behavior | Ce qui aurait dû se passer

To return an error that says the code is invalid

Screenshots

MineWeb (please complete the following information):

• OS: Ubuntu 20.04

• Microsoft Edge Beta

• Version : 1.13.0

• Web server : Apache2

• Path to logs (upload the content off /app/tmp/logs/error.log https://pastebin.com/AAkh44ZQ

[nivcoo]

I just looked at it is only visual there is the money that is taken

[wildmaster84]

Yes exactly, it should take 15.00 but takes 0.

[nivcoo]

No, it takes 15.00 if the item is 15.00

[wildmaster84]

No, it takes 15.00 if the item is 15.00

yes i know but the bug lets you get the item for free

[nivcoo]

I just tested with the bug, if I do the bug it displays 0 but it still takes the money from the item because the display is in javascript that's all