Provide references for CVE-2021-42671.
Where can I find more information about CVE-2021-42671?
References are available at: https://www.sourcecodester.com/php/13115/engineers-online-portal-php.html, https://github.com/TheHackingRabbi/CVE-2021-42671, https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42671.