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Vulnerability record · CVE-2019-20139 · published 30 December 2019

CVE-2019-20139: Nagios xi cross-site scripting vulnerability

Nagios · Nagios Xi

In Nagios XI 5.6.9, XSS exists via the nocscreenapi.php host, hostgroup, or servicegroup parameter, or the schedulereport.php hour or frequency parameter. Any authenticated user can attack the admin user.

5.4 CVSS 3.1 Medium EPSS 26% · top 2.1% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
26%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In Nagios XI 5.6.9, XSS exists via the nocscreenapi.php host, hostgroup, or servicegroup parameter, or the schedulereport.php hour or frequency parameter. Any authenticated user can attack the admin user.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://code610.blogspot.com/2019/12/multiple-xss-bugs-in-nagios-569.html ExploitThird Party Advisory
https://code610.blogspot.com/2019/12/multiple-xss-bugs-in-nagios-569.html ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-20139), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.