Provide references for CVE-2021-42667.
Where can I find more information about CVE-2021-42667?
References are available at: https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html, https://github.com/TheHackingRabbi/CVE-2021-42667, https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-42667.