Nagios XI < 5.8.7 Insecure Permissions on Highcharts Temporary Directory

Advisories

severity: high
date: October 30, 2025
Affecting: XI < 5.8.7
CVE: CVE-2021-47700
CWE: CWE-250 Execution with Unnecessary Privileges
CVSS: 8.5
CVSS V4 Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: Nagios XI Changelog
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.