PostNuke User.PHP UNAME Cross-Site Scripting Vulnerability

BID:7901

Info

PostNuke User.PHP UNAME Cross-Site Scripting Vulnerability

Bugtraq ID: 7901
Class: Input Validation Error
CVE:
Remote: Yes
Local: No
Published: Jun 13 2003 12:00AM
Updated: Jun 13 2003 12:00AM
Credit: Discovery of this vulnerability has been credited to David F. Madrid <[email protected]>.
Vulnerable: PostNuke Development Team PostNuke Phoenix 0.723
Not Vulnerable:

Discussion

PostNuke User.PHP UNAME Cross-Site Scripting Vulnerability

The PostNuke 'user.php' script does not sufficiently sanitize data supplied via URI parameters, making it prone to cross-site scripting attacks. This could allow for execution of hostile HTML and script code in the web client of a user who visits a web page that contains the malicious code.

Exploitation could allow for theft of cookie-based authentication credentials. Other attacks are also possible.

Exploit / POC

PostNuke User.PHP UNAME Cross-Site Scripting Vulnerability

The following proof of concept has been provided:

http://www.server.com/user.php?op=confirmnewuser&module=NS-NewUser&uname=%22
%3E%3Cimg%20src=%22javascript:alert(document.cookie);%22%3E&email=lucas@pelu
cas.com

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