TITLE:
MyBB "url" Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA19213

VERIFY ADVISORY:
http://secunia.com/advisories/19213/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
MyBB (formerly MyBulletinBoard) 1.x
http://secunia.com/product/4479/

DESCRIPTION:
imei addmimistrator has discovered a vulnerability in MyBB, which can
be exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "url" parameter in "member.php" isn't properly
sanitised before being returned to the user. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site.

Example:
http://[victim]/member.php?action=do_login&username=[valid
username]&password=[valid password]&url=[code]

Successful exploitation requires that the attacker supplies user
credentials for a valid account (e.g. the attacker's).

The vulnerability has been confirmed in version 1.10 and has also
been reported in versions 1.03 and 1.04. Other versions may also be
affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
imei addmimistrator

ORIGINAL ADVISORY:
http://kapda.ir/advisory-296.html
http://myimei.com/security/2006-03-09/mybb104memberphpxss-after-login.html

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