Advisories: - Title: Nagios XI < 5.8.9 Stored XSS via Command Names in Apply Config Error Text - Severity: MEDIUM - Date: October 30, 2025 - Affecting: XI < 5.8.9 - CVE: CVE-2022-50587 - CWE: - CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') - CVSS: 5.1 - CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N - References: - Nagios XI Changelog - Description: Nagios XI versions prior to 5.8.9 are vulnerable to cross-site scripting (XSS) via the Apply Configuration error text. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.