Exploit Title: Web Based Quiz System v1.0 is vulnerable to brute force attack
Software Link: https://www.sourcecodester.com/download-code?nid=14727&title=Web+Based+Quiz+System+in+PHP%2FMySQLi+with+Full+Source+Code
Version: v1.0
Describe:Web Based Quiz System v1.0 transmits user passwords in plaintext during the authentication process, allowing attackers to obtain users' passwords via a bruteforce attack.
Try to login in the input box.
Capture the packet and find that the password is plaintext transmission, and try to conduct a violent attack.
Judge whether it is the correct password according to different return values.
Add ratelimit protecion on POST login endpoints/parameters