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CVE

CVE-2021-25297

Nagios XI OS Command Injection

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/switch/switch.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.

HIGH · CVSS 8.8 ⚠ CISA KEV EPSS 0.81875
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

1
nagios xi>= 5.5.6 and <= 5.7.5
⚠

Public Exploits & PoCs

6
nucleiNagios 5.5.6-5.7.5 - Authenticated Remote Command Injectionhigh
pocpacketstormsecurity.com · Nagios-XI-5.7.5-Remote-Code-Execution.htmlpacketstormsecurity.com
pocpacketstormsecurity.com · Nagios-XI-5.7.5-Remote-Code-Execution.htmlpacketstormsecurity.com
pocassets.nagios.com · versions.phpassets.nagios.com
pocgithub.com · README.mdgithub.com
pocwww.fastly.com · anatomy-of-a-command-injection-cve-2021-25296-7-8-with-me...www.fastly.com
◈

Detection Rules (IDS/IPS)

1
et-openET EXPLOIT Nagios XI OS Command Injection (CVE-2021-25297 & CVE-2021-25298)attempted-admin
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Feb 2021 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2021-25297
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://nagios.comProduct
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25297US Government Resource
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