{"id":"CVE-2021-25296","published":"2021-02-15T13:15:12Z","modified":"2026-07-09T13:39:49Z","title":"Nagios XI OS Command Injection","vendor":"Nagios","product":"Nagios XI","tier":"core","eol":null,"description":{"text":"Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an OS command injection in Nagios XI (xi-5.7.5), located in the Windows WMI configuration wizard component, windowswmi.inc.php, where authenticated user-supplied input is not properly sanitized. An attacker with valid credentials and network access to the Nagios XI web interface can send a single crafted HTTP request to execute arbitrary operating system commands on the Nagios XI server, with no user interaction required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-31T04:54:12Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.71935,"percentile":0.99427,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2022-01-18","dueDate":"2022-02-01","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-25296","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-06-01","exploitedFirstSeen":"2021-06-01","ransomware":false,"evidence":[{"url":"https://unit42.paloaltonetworks.com/network-attack-trends-february-april-2021/","date":"2021-06-01"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-01-18"},{"url":"https://unit42.paloaltonetworks.com/mirai-variant-targets-iot-exploits/","date":"2023-06-22"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"},{"id":"CWE-138","name":"Improper Neutralization of Special Elements"}],"references":[{"url":"http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://assets.nagios.com/downloads/nagiosxi/versions.php","tags":["Product"]},{"url":"https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and","tags":["Exploit","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://assets.nagios.com/downloads/nagiosxi/versions.php","tags":["Product"]},{"url":"https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25296","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Exploited via crafted HTTP request to web app","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"which can lead to OS command injection on the Nagios XI server","start":273,"end":335}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: OS command injection yields command execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"which can lead to OS command injection on the Nagios XI server","start":273,"end":335}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-12196","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12196","exploited":true,"exploitedSince":"2022-01-18","provenance":"source"},"exploits":[],"exploitSources":{"metasploit":[{"name":"Nagios XI 5.5.6 to 5.7.5 - ConfigWizards Authenticated Remote Code Exection","module":"exploit/linux/http/nagios_xi_configwizards_authenticated_rce","type":"exploit","disclosureDate":"2021-02-13","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/nagios_xi_configwizards_authenticated_rce.rb"}],"nuclei":[{"id":"CVE-2021-25296","name":"Nagios XI 5.5.6-5.7.5 - Authenticated Remote Command Injection","severity":"high","path":"http/cves/2021/CVE-2021-25296.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-25296.yaml"}],"first":{"date":"2021-02-13","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/nagios_xi_configwizards_authenticated_rce.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html","https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md","https://www.fastly.com/blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and","http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2021-02-13","kind":"exploit-public","label":"First public exploit: Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/nagios_xi_configwizards_authenticated_rce.rb","provenance":"source"},{"date":"2021-02-15","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25296","provenance":"source"},{"date":"2021-06-01","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://unit42.paloaltonetworks.com/network-attack-trends-february-april-2021/","provenance":"source"},{"date":"2022-01-18","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-01-18","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-12196","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":337},"priority":{"score":69.0,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1978 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.89,"detail":"percentile 0.9943"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"3 NVD references tagged Exploit; 1 NVD exploit link; 1 Metasploit module; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}