CVE•Published 2021-02-15•Modified 2026-07-09•1 article on news•6 live references•NVD data
CVE-2021-25299Nagios · Nagios_xi
Vulnerability data via NVD (ingested)
CVSS v3.1
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2021-02-15
Modified 2026-07-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-25299Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Nagios Nagios Xi" version:"5.7.5"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Nagios Xi"HTTP body or banner mentions "Nagios Xi" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-25299Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-25299Censys host search filtered to this CVE id.
grep.app
CVE-2021-25299Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-25299GitHub code search for direct mentions.
Google dork
"CVE-2021-25299" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.