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1024cms Admin Control Panel v1.1.0 Beta (Master-cPanel Package) - Cross-Site Scripting Vulnerability

Software: 1024cms Admin Control Panel v1.1.0 Beta (master-cpanel package)
Vendor: http://1024cms.org/
Vuln Type: Cross-Site Scripting
Remote: Yes
Local: No
Discovered by: QSecure and Demetris Papapetrou
Website: http://www.qsecure.com.cy
Discovered: 15/03/2011
Reported: 29/03/2001
Disclosed: 07/04/2011

VULNERABILITY DESCRIPTION:

The scripts "/common/pages/lib/footer_login.php" and "/common/pages/lib/footer_loggedin.php" are prone to a cross-site-scripting vulnerability because they fail to
properly sanitize user-supplied input in the "msg" parameter.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may help the
attacker steal cookie-based authentication credentials and launch other attacks.

PoC Exploit:

Note: PHNjcmlwdD5hbGVydCgnWFNTJyk7PC9zY3JpcHQ%2b = URL_Encoded(Base64_Encoded(XSS string))

/index.php?msg=PHNjcmlwdD5hbGVydCgnWFNTJyk7PC9zY3JpcHQ%2b