Provide references for CVE-2021-38840.
Where can I find more information about CVE-2021-38840?
References are available at: https://www.sourcecodester.com/php/14906/simple-water-refilling-station-management-system-php-free-source-code.html, https://www.sourcecodester.com/users/tips23, https://www.exploit-db.com/exploits/50205, https://www.exploit-db.com/exploits/50204, https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-38840.