What’s Vulnerable › Vulnerabilities

CVE-2018-20172

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-17 · updated 2026-06-17
• Weakness: CWE-79

Description

An issue was discovered in Nagios XI before 5.5.8. The rss_url parameter of rss_dashlet/magpierss/scripts/magpie_slashbox.php is not filtered, resulting in an XSS vulnerability.

Affected products

• Nagios XI: before 5.5.8 — fixed in 5.5.8

How to fix

Upgrade to a fixed version: Nagios XI 5.5.8. Check the vendor advisory for mitigations.

References

• https://www.nagios.com/downloads/nagios-xi/change-log/
• https://www.seebug.org/vuldb/ssvid-97714
• https://www.nagios.com/downloads/nagios-xi/change-log/
• https://www.seebug.org/vuldb/ssvid-97714

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