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Servers and applications

CVE-2021-47698

Nagios XI versions prior to 5.8.7 using embedded Nagios Core are vulnerable to cross-site scripting (XSS) via the Core UI’s Views URL handling (escape_string()). 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.

Severity
Medium 5.1
Published
3 Nov 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
5.8.7
Sources
NVD

Affected software

SoftwareAffected versions
Nagios XIServers and applications · cpe:a:nagios:nagios_xi
  • Every version before 5.8.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-47698
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-47698