XSS in Nagios Fusion
CVE-2023-53690
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (53.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Nagios Fusion — versions 0
Weakness classification (CWE)
References
- www.nagios.com/products/security/ (vendor-advisory, patch, Vendor Advisory)
- www.nagios.com/changelog/nagios-fusion/ (release-notes, Release Notes, patch)
- www.vulncheck.com/advisories/nagios-fusion-ldap-ad-integration-stored-xss (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53690?
- CVE-2023-53690 is a medium-severity vulnerability in Nagios Fusion, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2025-10-30.
- How severe is CVE-2023-53690?
- Medium severity. CVSS v3 base score is 4.8 out of 10.