CVE-2018-25119 Nagios Fusion < 4.1.5 XSS via fusionwindow Parameter

What is CVE-2018-25119?

CVE-2018-25119 is a medium-severity cross-site scripting vulnerability in Nagios Fusion, published on 30 Oct 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-79

Which versions are affected by CVE-2018-25119?

It affects 1 product.

Products include Nagios Fusion.

How do I fix CVE-2018-25119?

No fix has been published for CVE-2018-25119 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-25119 being exploited?

There is no known exploitation of CVE-2018-25119 in the wild and no public exploit code.

Other vulnerabilities in Nagios Fusion

• CVE-2020-28900 Code injection in n/a Critical 9.8
• CVE-2020-28901 Command injection in n/a Critical 9.8
• CVE-2020-28902 Command injection in n/a Critical 9.8
• CVE-2020-28904 Privilege escalation in n/a Critical 9.8
• CVE-2020-28907 Security feature bypass in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fgw8-2xqf-m7qv.