{"id":"CVE-2024-13993","title":"Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers","summary":"Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"vendor":"nagios","product":"nagios_xi","affected":["nagios_xi < 2024","nagios_xi = 2024"],"patched":["nagios_xi 2024"],"published":"2025-10-30","updated":"2026-10-02","sourceUpdated":"2026-10-02T00:10:00.180","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-13993","references":[{"url":"https://www.nagios.com/changelog/nagios-xi/","label":"disclosure@vulncheck.com"},{"url":"https://www.nagios.com/products/security/#nagios-xi","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nagios-xi-reflected-xss-via-login-page-on-older-browsers","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00795,"epssPercentile":0.54827,"ingestedAt":"2026-10-02T01:05:54.704Z","slug":"CVE-2024-13993","body":"## Overview\n\nNagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login page can allow an attacker to craft a malicious link that, when visited by a victim, executes arbitrary JavaScript in the victim’s browser within the Nagios XI origin. The issue is observable under legacy browser behaviors; modern browsers may mitigate some vectors.\n\n## Affected\n\n- `nagios_xi < 2024`\n- `nagios_xi = 2024`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `nagios_xi 2024`","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}