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CVE-2021-25297

95
FAUCET Score

CVE-2021-25297 is an OS command injection vulnerability in Nagios XI versions up to 5.7.5, specifically within the switch.inc.php file. This flaw allows an authenticated attacker to execute arbitrary OS commands on the Nagios XI server due to improper sanitization of user-controlled input. With a CVSS score of 8.8 (HIGH), this vulnerability is easily exploitable over the network with low privileges and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. It is actively exploited in the wild, with public exploit modules available in Metasploit and Nuclei, and has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.5.6, <= 5.7.5CPE matchmatch criteria
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
56.38%
Probability of exploitation in next 30 days
EPSS Percentile
99.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Jan 18, 2022
Metasploit: Nagios XI 5.5.6 to 5.7.5 - ConfigWizards Authenticated Remote Code Exection · Feb 13, 2021
Nuclei: CVE-2021-25297 · Jan 24, 2023
This CVE's current EPSS score of 0.5638 is in the 98th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/161561/Nagios-XI-5.7.5-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
assets.nagios.com / downloads/nagiosxi/versions.php
Product
github.com / fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md
ExploitThird Party Advisory
fastly.com / blog/anatomy-of-a-command-injection-cve-2021-25296-7-8-with-metasploit-module-and
ExploitThird Party Advisory