{"id":"CVE-2021-25299","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-25299","summary":"Nagios XI version xi-5.7.5 is affected by cross-site scripting (XSS). The vulnerability exists in the file /usr/local/nagiosxi/html/admin/sshterm.php due to improper sanitization of…","details":"Nagios XI version xi-5.7.5 is affected by cross-site scripting (XSS). The vulnerability exists in the file /usr/local/nagiosxi/html/admin/sshterm.php due to improper sanitization of user-controlled input. A maliciously crafted URL, when clicked by an admin user, can be used to steal his/her session cookies or it can be chained with the previous bugs to get one-click remote command execution (RCE) on the Nagios XI server.","published":"2021-02-15T13:15:12.920","modified":"2026-07-09T01:16:47.040","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":{"score":0.9776,"percentile":0.99901,"asOf":"2026-09-13"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[],"fix":null,"references":[{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"},{"type":"WEB","url":"https://assets.nagios.com/downloads/nagiosxi/versions.php"},{"type":"EXPLOIT","url":"https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"},{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html"},{"type":"WEB","url":"https://assets.nagios.com/downloads/nagiosxi/versions.php"},{"type":"EXPLOIT","url":"https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:16:47.040"}}