Provide references for CVE-2021-43633.
Where can I find more information about CVE-2021-43633?
References are available at: https://www.sourcecodester.com/php/14996/messaging-web-application-phpoop-free-source-code.html, https://medium.com/%40shaunwhorton/how-i-found-two-different-xss-vulnerabilities-a491144e8494.