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MyBB Profile Blogs 1.2 Cross Site Scripting / SQL Injection

MyBB Profile Blogs 1.2 Cross Site Scripting / SQL Injection
Posted Dec 11, 2012
Authored by Zixem

MyBB Profile Blogs plugin version 1.2 suffers from cross site scripting and remote SQL injection vulnerabilities.

tags | exploit, remote, vulnerability, xss, sql injection
MD5 | 98444e0e603f4afa90b6a46741af32cd

MyBB Profile Blogs 1.2 Cross Site Scripting / SQL Injection

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# Exploit Title: MyBB Profile Blog plugin multiple vulnerabilities.
# Google Dork: inurl:member.php intext:"Profile Blogs" for MyBB
# Date: 12.9.2012
# Exploit Author: Zixem
# Vendor Homepage: http://fklar.pl/
# Software Link: http://mods.mybb.com/view/profile-blogs
# Version: 1.2+
# Tested on: Linux.

MyBB Profile Blogs plugin suffers from SQL Injection && Stored XSS.
The vulnerabilities exist withing profileblogs.php which located in /plugins/ folder.


#################################### SQLi ####################################

Instructions:
1. Create a new post in your profile blog.
2. Edit it.
3. Inject in edit GET parameter.

Vulnerable part:
<?php

/*Line 253*/ $pid = $mybb->input['edit'];
/*Line 259*/ $db->query("UPDATE `".TABLE_PREFIX."blogposts` SET `subject` = '".$subject."', `message` = '".$message."' WHERE `pid` = '".$pid."'");

?>

How to exploit it:
member.php?action=profile&uid=2&blogpage=1&edit=[VAILD_ID]'[SQLi]

PoC: http://i.imgur.com/HY60R.png



+----------------------------------------------------------------------------------------+



#################################### Stored-XSS ####################################

The post subject is stored in the database without XSS protection, like this:
<?php
$subject = addslashes($mybb->input['subject']);
$db->query("INSERT INTO `".TABLE_PREFIX."blogposts` VALUES (NULL, '".$uid."', '".$dateline."', '".$subject."', '".$message."', '".$ipaddress."')");
?>

And also comes out without XSS protection:

<?php
/*328*/ while($post = $db->fetch_array($query)) {
/*333*/ $blog .= "<strong style=\"float: left;\">".$post['subject']."</strong><br />";
?>

As a result, we're getting Stored-XSS.

How to exploit that: http://i.imgur.com/OTIRa.png
PoC: http://i.imgur.com/2Hv9J.png


Follow: http://twitter.com/z1xem


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