Medium 5.1Published Oct 30, 2025

CVE-2020-36858Nagios Log Server < 2.1.6 XSS via Create User, Edit User, & Manage Host Lists Pages

Updated under an hour ago (Oct 26, 2026, 3:00 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Nagios Log Server

Exploited in the last 30 days

Nagios Log Server versions prior to 2.1.6 contain cross-site scripting (XSS) vulnerabilities via the web interface on the Create User, Edit User, and Manage Host Lists pages. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

CVSS: 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Nov 17, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Nagios Log Server nagios:log_server (from the name)	before 2.1.6	CNA record
nagios log_server nagios:log_server	before 2.1.6	NVD

References

References

https://www.nagios.com/changelog/nagios-log-server-2024r1/	release-notes, patch
https://www.vulncheck.com/advisories/nagios-log-server-xss-via-create-user-edit-user-and-manage-host-lists-pages	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.