CVEs-PoC/2021/CVE-2021-23814.md

### [CVE-2021-23814](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23814)
![](https://img.shields.io/static/v1?label=Product&message=unisharp%2Flaravel-filemanager&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Arbitrary%20File%20Upload&color=brightgreen)

### Description

This affects versions of the package unisharp/laravel-filemanager before 2.6.2. The upload() function does not sufficiently validate the file type when uploading.

An attacker may be able to reproduce the following steps:

1. Install a package with a web Laravel application.
2. Navigate to the Upload window
3. Upload an image file, then capture the request
4. Edit the request contents with a malicious file (webshell)
5. Enter the path of file uploaded on URL - Remote Code Execution


**Note:** Prevention for bad extensions can be done by using a whitelist in the config file(lfm.php). Corresponding document can be found in [here](https://unisharp.github.io/laravel-filemanager/configfolder-categories).

### POC

#### Reference
- https://security.snyk.io/vuln/SNYK-PHP-UNISHARPLARAVELFILEMANAGER-1567199
- https://snyk.io/vuln/SNYK-PHP-UNISHARPLARAVELFILEMANAGER-1567199

#### Github
- https://github.com/Yucaerin/laravel