What’s Vulnerable › Vulnerabilities

CVE-2021-37351

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-13 · updated 2026-06-17
• Weakness: CWE-276

Description

Nagios XI before version 5.8.5 is vulnerable to insecure permissions and allows unauthenticated users to access guarded pages through a crafted HTTP request to the server.

Affected products

• Nagios XI: before 5.8.5 — fixed in 5.8.5

How to fix

Upgrade to a fixed version: Nagios XI 5.8.5. 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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