Secure file upload: Enable antivirus

• Enable/configure antivirus
• Enable logging/alerts if suspicious files have been uploaded

Ref:

• Penetration testing ID:WSTG-BUSL-09 : https://owasp.org/www-project-web-security-testing-guide/v42/4-Web_Application_Security_Testing/10-Business_Logic_Testing/09-Test_Upload_of_Malicious_Files
• https://cheatsheetseries.owasp.org/cheatsheets/File_Upload_Cheat_Sheet.html