CVE-2021-25298: Nagios XI OS Command Injection

Vulnerability summary

CVE-2021-25298 is a high (CVSS 9.0) OS Command Injection vulnerability in Nagios Nagios XI. It is known to be exploited: CISA lists it, first on 18-01-2022. EPSS estimates a 73.64% chance of exploitation in the next 30 days, higher than 99.4% of scored vulnerabilities. 5 public exploits are recorded.

Timeline

1. 15-02-2021
   PublishedVulnerability first disclosed.
2. 18-01-2022
   Added to CISA KEVNagios XI OS Command Injection
3. 01-02-2022
   CISA remediation dueApply updates per vendor instructions.
4. 09-07-2026
   Last modifiedVulnerability information updated.

Description

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/cloud-vm/cloud-vm.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.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.