CVE-2023-53690 Nagios Fusion < 4.2.0 LDAP/AD Integration Stored XSS

What is CVE-2023-53690?

CVE-2023-53690 is a medium-severity cross-site scripting vulnerability in Nagios Fusion, published on 30 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-79

Which versions are affected by CVE-2023-53690?

It affects 1 product.

Products include Nagios Fusion.

How do I fix CVE-2023-53690?

No fix has been published for CVE-2023-53690 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-2023-53690 being exploited?

There is no known exploitation of CVE-2023-53690 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-6q4w-8x5h-w5c4.