What’s Vulnerable › Vulnerabilities

CVE-2020-15903

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-09-09 · updated 2026-06-17

Description

An issue was found in Nagios XI before 5.7.3. There is a privilege escalation vulnerability in backend scripts that ran as root where some included files were editable by nagios user. This issue was fixed in version 5.7.3.

Affected products

• Nagios XI: before 5.7.3 — fixed in 5.7.3

How to fix

Upgrade to a fixed version: Nagios XI 5.7.3. Check the vendor advisory for mitigations.

References

• https://www.nagios.com/downloads/nagios-xi/change-log/
• https://www.nagios.com/downloads/nagios-xi/change-log/

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