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----------------------
Available at: http://evuln.com/vulns/132/exploit.html
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----------------------
Available at: http://evuln.com/vulns/132/exploit.html
--------------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
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