Vulnerability identifier: #VU37149

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10554

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nagios XI
Server applications / Other server solutions

Vendor: nagios.org

Description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via the hour, minute, or ampm parameter, related to components/scheduledreporting; (2) includes/components/xicore/downtime.php, related to the update_pages function; (3) the ajaxhelper.php opts or background parameter; (4) the i[] array parameter to ajax_handler.php; or (5) the deploynotification.php title parameter. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Nagios XI: 5.4.13

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External links
http://code610.blogspot.com/2018/04/few-bugs-in-latest-nagios-xi-5413.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.