Vulnerability · Published Oct 30, 2025 · Assigned by VulnCheck
CVE-2021-47696Nagios XI < 5.8.0 XSS via BPI Config ID Handling
Medium 5.1
In plain English
A medium-severity cross-site scripting in XI from Nagios. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.4%top 61.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Nagios XI versions prior to 5.8.0 are vulnerable to cross-site scripting (XSS) via BPI config ID handling. 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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
References
- https://www.nagios.com/changelog/nagios-xi/ release-notes, patch
- https://www.vulncheck.com/advisories/nagios-xi-xss-via-bpi-config-id-handling third-party-advisory