What is CVE-2020-36858?

CVE-2020-36858 is a medium-severity vulnerability in Nagios Log Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-10-30.

How severe is CVE-2020-36858?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Nagios Log Server

CVE-2020-36858

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 a…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (36.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nagios Log Server — versions 0
Nagios Log_server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2020-36858?: CVE-2020-36858 is a medium-severity vulnerability in Nagios Log Server, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-10-30.
How severe is CVE-2020-36858?: Medium severity. CVSS v3 base score is 5.4 out of 10.