Vulnerability · Published Oct 30, 2025 · Assigned by VulnCheck
CVE-2023-7312Nagios Fusion < 4.2.0 Email Settings Stored XSS via SMTP/sendmail
Medium 6.2
In plain English
A medium-severity cross-site scripting in Fusion from Nagios. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
References
- https://www.nagios.com/products/security/#fusion vendor-advisory, patch
- https://www.nagios.com/changelog/nagios-fusion/ release-notes, patch
- https://www.vulncheck.com/advisories/nagios-fusion-email-settings-stored-xss-via-smtp-sendmail third-party-advisory