{"id":"CVE-2020-28903","aliases":["EUVD-2020-21294","GHSA-c3f6-5x5g-vp36"],"status":"published","title":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with...","description":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.13197,"percentile":0.96398,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-05-24T12:43:39Z","modified":"2026-06-17T03:10:47Z","products":[{"vendor":"nagios","product":"fusion"}],"references":[{"url":"https://www.nagios.com/downloads/nagios-xi/change-log/","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory"]},{"url":"https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28903"},{"url":"https://github.com/advisories/GHSA-c3f6-5x5g-vp36"}],"sources":{"cve":[{"id":"CVE-2020-28903","description":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.","status":"published","published":"2021-05-24T12:43:39Z","modified":"2024-08-04T16:40:59.98Z","updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2020-21294","description":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.","status":"published","published":"2021-05-24T12:43:39Z","modified":"2024-08-04T16:40:59Z","updated_at":"2026-11-03T03:07:09.169254Z"}],"ghsa":[{"id":"GHSA-c3f6-5x5g-vp36","title":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with...","description":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.","status":"published","published":"2022-05-24T19:03:04Z","modified":"2023-01-29T05:06:46Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:05.929333Z"}],"nvd":[{"id":"CVE-2020-28903","description":"Improper input validation in Nagios Fusion 4.1.8 and earlier allows a remote attacker with control over a fused server to inject arbitrary HTML, aka XSS.","status":"published","published":"2021-05-24T13:15:07.703Z","modified":"2026-06-17T03:10:47.997Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:39.25999Z"}]}}