MEDIUM4.0

GHSA-gg6x-xx78-448c

Reflected XSS when importing CSV in OctoberCMS

Quick fix

GHSA-gg6x-xx78-448c — october/backend: upgrade to the fixed version with the command below.

composer require october/backend:^1.0.466

Details

### Impact A user with the ability to use the import functionality of the `ImportExportController` behavior could be socially engineered by an attacker to upload a maliciously crafted CSV file which could result in a reflected XSS attack on the user in question

### Patches Issue has been patched in Build 466 (v1.0.466).

### Workarounds Apply https://github.com/octobercms/october/commit/cd0b6a791f995d86071a024464c1702efc50f46c to your installation manually if unable to upgrade to Build 466.

### References Reported by [Sivanesh Ashok](https://stazot.com/)

### For more information If you have any questions or comments about this advisory: * Email us at [hello@octobercms.com](mailto:hello@octobercms.com)

### Threat assessment: <img width="1100" alt="Screen Shot 2020-03-31 at 2 01 52 PM" src="https://user-images.githubusercontent.com/7253840/78070158-8f7ef580-7358-11ea-950c-226533f6a0a3.png">

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/october/backend

Introduced in: 1.0.319Fixed in: 1.0.466

Fixcomposer require october/backend:^1.0.466