{"cve_id":"CVE-2021-25299","published":"2021-02-15T13:15:12.920000+00:00","last_modified":"2026-07-09T01:16:47.040000+00:00","vuln_status":"Modified","description":"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.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","base_score":6.1,"base_severity":"MEDIUM","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"CHANGED","impact_c":"LOW","impact_i":"LOW","impact_a":"NONE","cwe_ids":["CWE-79"],"in_kev":false,"kev_date_added":null,"kev_ransomware":false,"epss_score":0.9776,"epss_percentile":0.99905,"cap_rule_version":"0.1.1","stage":"CRED_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"NONE","caps":["CRED_ACCESS","INFO_DISCLOSURE","TAMPER"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:34:18.848181+00:00","first_seen":"2021-02-15T13:15:12.920000+00:00","kev_first_seen":null,"novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["nagios"],"products":["nagios_xi"],"affected":[{"vendor":"nagios","product":"nagios_xi","ranges":["5.7.5"]}]}