← Vulnerability feed

Vulnerability record · CVE-2020-36858 · published 30 October 2025

CVE-2020-36858: Nagios log server cross-site scripting vulnerability

Nagios · Log Server

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.

5.1 CVSS 4.0 Medium EPSS 0.51% · top 58.6% CWE-79 · Cross-site scripting
5.1CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

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

References

LinkTags
https://www.nagios.com/changelog/nagios-log-server-2024r1/ Release Notes
https://www.vulncheck.com/advisories/nagios-log-server-xss-via-create-user-edit-user-and-manage-host-lists-pages Third Party Advisory

Track CVE-2020-36858 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.4CVE-2025-34277Nagios log server code injection vulnerabilityNagios Log Server versions prior to 2024R1.3.1 contain a code injection vulnerability where malformed dashboard ID values are not properly validated …EPSS 2.2%9.3CVE-2025-34274Nagios log server execution with unnecessary privileges vulnerabilityNagios Log Server versions prior to 2024R2.0.3 contain an execution with unnecessary privileges vulnerability as it runs its embedded Logstash proces…EPSS 2.1%8.8CVE-2025-44823Nagios log server vulnerabilityNagios Log Server before 2024R1.3.2 allows authenticated users to retrieve cleartext administrative API keys via a /nagioslogserver/index.php/api/sys…EPSS 16%8.7CVE-2025-34298Nagios log server vulnerabilityNagios Log Server versions prior to 2024R1.3.2 contain a privilege escalation vulnerability in the account email-change workflow. A user could set th…EPSS 0.71%8.7CVE-2025-34271Nagios log server cleartext transmission vulnerabilityNagios Log Server versions prior to 2024R2.0.2 contain a vulnerability in the cluster manager component when requesting sensitive credentials from pe…EPSS 0.74%8.7CVE-2023-7322Nagios log server incorrect authorization vulnerabilityNagios Log Server versions prior to 2024R1 contain an incorrect authorization vulnerability. Users who lacked the required API permission were nevert…EPSS 1.1%8.6CVE-2025-34322Nagios log server os command injection vulnerabilityNagios Log Server versions prior to 2026R1.0.1 contain an authenticated command injection vulnerability in the experimental 'Natural Language Queries…EPSS 9.5%8.5CVE-2025-34323Nagios log server incorrect permission assignment vulnerabilityNagios Log Server versions prior to 2026R1.0.1 are vulnerable to local privilege escalation due to a combination of sudo misconfiguration and group-w…EPSS 0.33%

Source: NIST National Vulnerability Database (record CVE-2020-36858), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.