Provide references for CVE-2021-43509.
Where can I find more information about CVE-2021-43509?
References are available at: https://r4hn1.medium.com/journey-to-first-two-cve-by-rahul-kalnarayan-307e2e87ee26, https://github.com/r4hn1/Simple-Client-Management-System-Exploit/blob/main/CVE-2021-43509.