Cross-Site Scripting Vulnerability in Nagios Fusion
CVE-2017-20209

5.1MEDIUM

Key Information:

Vendor

NagiOS

Status
Fusion
Vendor
CVE Published:
30 October 2025

What is CVE-2017-20209?

Nagios Fusion versions prior to 4.0.1 are susceptible to cross-site scripting (XSS) vulnerabilities, particularly through the Users and Servers pages. This security issue arises from inadequate validation or escaping of user-supplied input, allowing attackers to inject and execute arbitrary scripts within the context of a user's web browser. If exploited, this vulnerability can lead to unauthorized actions and data breaches, highlighting the importance of keeping software updated and implementing robust security practices.

Affected Version(s)

Fusion 0 < 4.0.1

References

https://www.nagios.com/changelog/nagios-fusion/
release-notespatch
https://www.vulncheck.com/advisories/nagios-fusion-xss-vi...
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
.
CVE-2017-20209 : Cross-Site Scripting Vulnerability in Nagios Fusion