CVE-2017-20209

Nagios Fusion versions prior to 4.0.1 are vulnerable to cross-site scripting (XSS) via the Users and Servers pages. 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.

Score

CVSS 3.1 6.1 Medium

Status

Analyzed - disclosure@vulncheck.com

Published

2025-10-30

Last modified

2026-10-18

Weaknesses

CWE-79

Affected products

• Fusion (Nagios)

References

• https://www.nagios.com/changelog/nagios-fusion/
• https://www.vulncheck.com/advisories/nagios-fusion-xss-via-users-servers-page