Nagios Fusion
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By the Year
In 2026 there have been 0 vulnerabilities in Nagios Fusion. Last year, in 2025 Fusion had 8 security vulnerabilities published. Right now, Fusion is on track to have less security vulnerabilities in 2026 than it did last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 0 | 0.00 |
| 2025 | 8 | 7.60 |
| 2024 | 0 | 0.00 |
| 2023 | 0 | 0.00 |
| 2022 | 0 | 0.00 |
| 2021 | 11 | 8.89 |
| 2020 | 0 | 0.00 |
| 2019 | 0 | 0.00 |
| 2018 | 1 | 6.10 |
It may take a day or so for new Fusion vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Nagios Fusion Security Vulnerabilities
Nagios Fusion XSS Users/Servers (<4.0.1)
CVE-2017-20209
- October 30, 2025
Nagios Fusion versions prior to 4.0.1 are vulnerable to cross-site scripting (XSS) via the Users and Servers 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.
XSS
Nagios Fusion <4.1.5 XSS via fusionwindow parameter
CVE-2018-25119
- October 30, 2025
Nagios Fusion versions prior to 4.1.5 are vulnerable to cross-site scripting (XSS) via the "fusionwindow" parameter. 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.
XSS
Nagios Fusion <4.2.0 Reflected XSS in License Key Config
CVE-2023-53689
- October 30, 2025
Nagios Fusion versions prior to 4.2.0 contain a reflected cross-site scripting (XSS) vulnerability in the license key configuration flow that can result in execution of attacker-controlled script in the browser of a user who follows a crafted URL. While the application server itself is not directly corrupted by the reflected XSS, the resulting browser compromise can lead to credential/session theft and unauthorized administrative actions.
XSS
Nagios Fusion <4.2 XSS in LDAP/AD Auth-Server Config
CVE-2023-53690
- October 30, 2025
Nagios Fusion versions prior to 4.2.0 contain a stored cross-site scripting (XSS) vulnerability in the LDAP/AD authentication-server configuration. Unsanitized user input can be stored and later rendered in the administrative UI, causing JavaScript to execute in the browser of any user who views the affected page. An attacker who can add authentication servers via LDAP/AD integration could persist a malicious payload that executes in the context of other users' browsers.
XSS
Nagios Fusion <4.2.0 Stored XSS via Email Settings
CVE-2023-7312
- October 30, 2025
Nagios Fusion versions prior to 4.2.0 contain a stored cross-site scripting (XSS) vulnerability when adding or configuring Email Settings. Unsanitized user input can be stored and later rendered in the administrative UI, causing JavaScript to execute in the browser of any user who views the affected page. An attacker who can add or modify SMTP/email settings or manipulate the sendmail configuration fields could persist a malicious payload that executes in the context of other users' browsers.
XSS
Nagios Fusion <R2.1: 2FA Session Fixation & Persistent Attack
CVE-2025-34269
- October 30, 2025
Nagios Fusion <=2024R2.1 2FA Brute-Force Bypass
CVE-2025-34249
- October 30, 2025
Rate Limiting Flaw in Nagios Fusion v2024 OTP Brute-Force Auth Bypass
CVE-2025-60424
7.6 - High
- October 27, 2025
A lack of rate limiting in the OTP verification component of Nagios Fusion v2024R1.2 and v2024R2 allows attackers to bypass authentication via a bruteforce attack.
Improper Restriction of Excessive Authentication Attempts
Insufficient Verification of Data Authenticity in Nagios Fusion 4.1.8 and earlier and Nagios XI 5.7.5 and earlier
CVE-2020-28900
9.8 - Critical
- May 24, 2021
Insufficient Verification of Data Authenticity in Nagios Fusion 4.1.8 and earlier and Nagios XI 5.7.5 and earlier allows for Escalation of Privileges or Code Execution as root via vectors related to an untrusted update package to upgrade_to_latest.sh.
Insufficient Verification of Data Authenticity
Incorrect File Permissions in Nagios XI 5.7.5 and earlier and Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root
CVE-2020-28906
8.8 - High
- May 24, 2021
Incorrect File Permissions in Nagios XI 5.7.5 and earlier and Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root. Low-privileged users are able to modify files that are included (aka sourced) by scripts executed by root.
Incorrect Default Permissions
Command Injection in Nagios Fusion 4.1.8 and earlier
CVE-2020-28902
9.8 - Critical
- May 24, 2021
Command Injection in Nagios Fusion 4.1.8 and earlier allows Privilege Escalation from apache to root in cmd_subsys.php.
Command Injection
Improper input validation in Nagios Fusion 4.1.8 and earlier
CVE-2020-28903
6.1 - Medium
- May 24, 2021
Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.
XSS
Execution with Unnecessary Privileges in Nagios Fusion 4.1.8 and earlier
CVE-2020-28904
9.8 - Critical
- May 24, 2021
Execution with Unnecessary Privileges in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation as nagios via installation of a malicious component containing PHP code.
Improper Privilege Management
Improper Input Validation in Nagios Fusion 4.1.8 and earlier
CVE-2020-28905
8.8 - High
- May 24, 2021
Improper Input Validation in Nagios Fusion 4.1.8 and earlier allows an authenticated attacker to execute remote code via table pagination.
Code Injection
Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier
CVE-2020-28907
9.8 - Critical
- May 24, 2021
Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier allows for Escalation of Privileges or Code Execution as root via vectors related to download of an untrusted update package in upgrade_to_latest.sh.
Improper Certificate Validation
Command Injection in Nagios Fusion 4.1.8 and earlier
CVE-2020-28901
9.8 - Critical
- May 24, 2021
Command Injection in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation or Code Execution as root via vectors related to corrupt component installation in cmd_subsys.php.
Command Injection
Command Injection in Nagios Fusion 4.1.8 and earlier
CVE-2020-28908
9.8 - Critical
- May 24, 2021
Command Injection in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to nagios.
Command Injection
Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root via modification of scripts
CVE-2020-28909
8.8 - High
- May 24, 2021
Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root via modification of scripts. Low-privileges users are able to modify files that can be executed by sudo.
Incorrect Permission Assignment for Critical Resource
Incorrect Access Control in Nagios Fusion 4.1.8 and earlier
CVE-2020-28911
6.5 - Medium
- May 24, 2021
Incorrect Access Control in Nagios Fusion 4.1.8 and earlier allows low-privileged authenticated users to extract passwords used to manage fused servers via the test_server command in ajaxhelper.php.
Insecure Storage of Sensitive Information
Nagios Fusion before 4.1.4 has XSS
CVE-2018-12501
6.1 - Medium
- June 16, 2018
Nagios Fusion before 4.1.4 has XSS, aka TPS#13332-13335.
XSS
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