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Title: RunCMS XSS Vulnerability via User Agent
Vendor: RunCMS
Product: RunCMS
Tested Version: 2.1
Threat Class: XSS
Severity: Medium
Remote: yes
Local: no
Discovered By: Andrei Rimsa Alvares
===== Description ====
RunCMS is prone to a XSS vulnerability by mangling the user-agent field on a http request to a script within the forum module.
----- modules/forum/check.php -----
01: ...
10: echo "BROWSER: ".$_SERVER['HTTP_USER_AGENT']=3B
----- modules/forum/check.php -----
===== Impact ====
Malicious java script code can be executed in the context of the affected web site.
===== Proof of Concept ====
wget --user-agent="
" http://target/modules/forum/check.php
===== Workaround ====
Remove the affected file form the system: modules/forum/check.php.
===== Disclosure Timeline ====
June=2C 16 2010 - Vendor notification.
June=2C 17 2010 - Vendor response confirming the bug.
July=2C 07 2010 - Public disclosure.
===== References ====
http://www.runcms.org
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