New eVuln Advisory:
MyBB 'Avatar URL' XSS Vulnerability
http://evuln.com/vulns/132/summary.html

--------------------Summary----------------
eVuln ID: EV0132
Vendor: MyBB Group
Vendor's Web Site: http://www.mybboard.com/
Software: MyBB
Sowtware's Web Site: http://www.mybboard.com/
Versions: 1.1.6 and earlier
Critical Level: Moderate
Type: Cross-Site Scripting
Class: Remote
Status: Unpatched. No reply from developer(s)
PoC/Exploit: Available
Solution: Available
Discovered by: Aliaksandr Hartsuyeu (eVuln.com)

-----------------Description---------------
Every user has an ability to edit his avatar URL. Avatar URL is not properly sanitized. This can be used to post arbitrary web script code using 'Tab' symbol.

--------------PoC/Exploit----------------------

Example of XSS:

Avatar URL:
javasc ript:alert(123)
(using 'Tab' symbol to separate 'script' word)

--------------Solution---------------------
Solution is available at vendors web site:

Upgrade you copy of MyBB to the 1.1.7 version.

http://www.mybboard.com/

--------------Credit-----------------------
Discovered by: Aliaksandr Hartsuyeu (eVuln.com)


Regards,
Aliaksandr Hartsuyeu
http://evuln.com - Penetration Testing Services