payload:table=gbook&where=1=1 union select password from zzz_user&col=1
In the file：
line262，get_json() method supports execution through the getmodule() method and when the value of the $act variable is getjson. At this time, it will get the URL as follows:
And in the where parameter, the array can be used to bypass the restriction, and there is no SQL injection filter on the parameter, resulting in SQL injection.