Cross-Site Scripting Vulnerability in Nagios XI
CVE-2021-47699

5.1MEDIUM

Key Information:

Vendor

NagiOS

Status
Xi
Vendor
CVE Published:
30 October 2025

What is CVE-2021-47699?

Nagios XI versions prior to 5.8.7 contain a cross-site scripting vulnerability that can be exploited via the Send to NLS form on the Audit Log page. Due to insufficient validation and escaping of user inputs, an attacker may be able to inject arbitrary script code. This can lead to the execution of the malicious script in the context of the victim's browser, potentially compromising user data and session integrity.

Affected Version(s)

XI 0 < 5.8.7

References

https://www.nagios.com/changelog/nagios-xi/
release-notespatch
https://www.vulncheck.com/advisories/nagios-xi-xss-in-aud...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2021-47699 : Cross-Site Scripting Vulnerability in Nagios XI