Provide references for CVE-2021-36621.
Where can I find more information about CVE-2021-36621?
References are available at: https://www.exploit-db.com/exploits/50109, https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/oretnom23/CVE-nu11-18-09-2821, http://packetstormsecurity.com/files/164324/Covid-Vaccination-Scheduler-System-1.0-SQL-Injection-Cross-Site-Scripting.html.