MyBB 1.4/1.6 - Multiple Vulnerabilities

Author: MustLive
type: webapps
platform: php
port: 
date_added: 2011-04-04 
date_updated: 2016-12-18 
verified: 1 
codes:  
tags: 
aliases:  
screenshot_url:  
application_url: 

source: https://www.securityfocus.com/bid/47131/info

MyBB is prone to multiple security vulnerabilities. These vulnerabilities include a username-enumeration weakness, an XML-injection vulnerability, and a cross-site scripting vulnerability.

Exploiting these issues may allow attackers to discern valid usernames, which may aid them in brute-force password cracking or other attacks. Attacker-supplied XML and script code would run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or to control how the site is rendered to the user.

Versions prior to 1.6.2 and 1.4.15 are vulnerable.

XML-injection:
http://www.example.com/xmlhttp.php?action=username_exists&value=%3Cxml/%3E

XSS:
http://www.example.com/xmlhttp.php?action=username_exists&value=%3Cdiv%20xmlns=%22http://www.w3.org/1999/xhtml%22%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E%3C/div%3E