CVE-2021-47699

5.1 mediumEPSS 0.4%

Medium (5.1) in nagios nagios xi. EPSS 0.4% chance of exploitation in the next 30 days.

Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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

CVSS 4.0

5.1 medium

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

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2025-10-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nagios:nagios_xi

References

https://www.nagios.com/changelog/nagios-xi/
https://www.vulncheck.com/advisories/nagios-xi-xss-in-audit-log-via-send-to-nls-form

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