{"id":"CVE-2021-47699","aliases":["EUVD-2021-34704","GHSA-jphc-8p86-c5pc"],"status":"published","title":"Nagios XI \u003c 5.8.7 XSS in Audit Log via Send to NLS Form","description":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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.","severity":{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0042,"percentile":0.36629,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2025-10-30T21:48:05Z","modified":"2026-06-17T04:18:19Z","products":[{"vendor":"nagios","product":"nagios_xi"},{"vendor":"nagios","product":"xi"}],"references":[{"url":"https://www.nagios.com/changelog/nagios-xi/","tags":["release-notes","patch","Release Notes"]},{"url":"https://www.vulncheck.com/advisories/nagios-xi-xss-in-audit-log-via-send-to-nls-form","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47699"},{"url":"https://www.nagios.com/changelog/nagios-xi"},{"url":"https://github.com/advisories/GHSA-jphc-8p86-c5pc"}],"sources":{"cve":[{"id":"CVE-2021-47699","title":"Nagios XI \u003c 5.8.7 XSS in Audit Log via Send to NLS Form","description":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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.","status":"published","published":"2025-10-30T21:48:05.631Z","modified":"2025-11-17T18:21:43.598Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:56.308189Z"}],"euvd":[{"id":"EUVD-2021-34704","description":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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.","status":"published","published":"2025-10-30T21:48:05Z","modified":"2025-11-17T18:21:43Z","cvss":[{"version":"4.0","score":5.1,"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","level":"medium"}],"updated_at":"2026-11-02T19:49:16.200687Z"}],"ghsa":[{"id":"GHSA-jphc-8p86-c5pc","title":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log...","description":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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.","status":"published","published":"2025-10-31T00:30:32Z","modified":"2025-11-05T18:32:36Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"},{"version":"4.0","score":5.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:04:40.688125Z"}],"nvd":[{"id":"CVE-2021-47699","description":"Nagios XI versions prior to 5.8.7 are vulnerable to cross-site scripting (XSS) via the Audit Log page’s Send to NLS form. 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.","status":"published","published":"2025-10-30T22:15:41.357Z","modified":"2026-06-17T04:18:19.017Z","cvss":[{"version":"4.0","score":5.1,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:09.005706Z"}]}}