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Describe the Bug

Unrestricted file upload lead to RCE

Version Info

• KChat version: 2.0.3
• PHP version: PHP 8.1.2
• MySQL version: 8.0.35
• Web server (Ex. Apache, nginx or IIS?) : Apache
• OS name and version: Ubuntu 22.04

Reference

https://huntr.com/bounties/4412797f-313f-4f2d-82d6-807a6d55befb/

cc @GaneshKandu @wolf128058