Provide references for CVE-2021-40577.
Where can I find more information about CVE-2021-40577?
References are available at: https://medium.com/%40J03KR/cve-2021-40577-ec96a831ba71, http://packetstormsecurity.com/files/165106/Online-Enrollment-Management-System-In-PHP-And-PayPal-1.0-Cross-Site-Scripting.html.