CVE-2020-36861 MEDIUM

CVE-2020-36861: Nagios XI < 5.7.5 Core Config Manager (CCM) XSS via Overlay Rendering and Notification/Check Period Pages

Vendor Nagios
Product XI
Weakness CWE-79 · XSS
Published October 30, 2025
Last update November 17, 2025
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.0.8 / Nagios XI 5.7.5 contains multiple cross-site scripting (XSS) vulnerabilities in the overlay UI elements and the Notification/Check Period 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.

Key dates

02Disclosure timeline

October 30, 2025 CVE published
November 17, 2025 Record updated