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ExtCalendar 2.0 Beta 2 (upgrade.php) Remote XSS Vulnerability
<html><body><p>ExtCalendar 2.0 Beta 2 (upgrade.php) Remote XSS Vulnerability
Advisory ID: ZSL-2010-4928
Summary: ExtCalendar is a powerful multi-user web-based calendar
application. Features include Multi-Languages, Themes,
Recurrent Events, Categories, Users and Groups management,
Environment and General Settings, Template Configuration,
Product Updates.
Product web page: http://sourceforge.net/projects/extcal/
Description: ExtCalendar is prone to a cross-site scripting vulnerability
because it fails to properly sanitize user-supplied input. 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 allow the attacker to steal cookie-based
authentication credentials and to launch other attacks. The issue
exist in the upgrade.php script in the html_footer() function, line
361. Conditional on register_globals turned ON. This vuln was found
using Pixy code auditor.
Advisory: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2010-4928.php
Details:
------------------------------------------------------------------------
*** detecting vulnerabilities ***
*****************
XSS Analysis BEGIN
*****************
Number of sinks: 10
XSS Analysis Output
--------------------
Vulnerability detected!
- conditional on register_globals=on
- C:\wamp\www\extcal2.0_b2\upgrade.php:361
- Graph: xss10
Total Graph Count: 10
Total Vuln Count: 1
*****************
XSS Analysis END
*****************
------------------------------------------------------------------------
function html_footer()
{
global $step;
echo <<<eot name="step" type="hidden" value="$step">
</eot></p></body>
</html>
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27 Feb 2010 00:00Current
6Medium risk
Vulners AI Score6