What’s Vulnerable › Vulnerabilities

CVE-2021-47700: Nagios XI < 5.8.7 Insecure Permissions on Highcharts Temporary Directory

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-30 · updated 2026-06-17
• Weakness: CWE-250

Description

Nagios XI versions prior to 5.8.7 used a temporary directory for Highcharts exports with overly permissive ownership/permissions under the Apache user. Local or co-hosted processes could read/overwrite export artifacts or manipulate paths, risking disclosure or tampering and potential code execution depending on deployment.

Affected products

• Nagios XI: before 5.8.7 — fixed in 5.8.7

How to fix

Upgrade to a fixed version: Nagios XI 5.8.7. Check the vendor advisory for mitigations.

References

• https://www.nagios.com/changelog/nagios-xi/
• https://www.vulncheck.com/advisories/nagios-xi-insecure-permissions-on-highcharts-temporary-directory

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