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CVE-2019-20197

40
FAUCET Score

CVE-2019-20197 describes a critical OS command injection vulnerability in Nagios XI version 5.6.9. An authenticated attacker can execute arbitrary operating system commands by injecting shell metacharacters into the 'id' parameter of the schedulereport.php script, running in the context of the web server user. This vulnerability carries a CVSS score of 8.8 (High), indicating a high potential for impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high EPSS and FAUCET Risk Scores suggest a significant threat if exploited.

Impacted Technologies

VendorProductVersion(s)CPE
5.6.9CPE matchmatch criteria
cpe:2.3:a:nagios:nagios_xi:5.6.9:*:*:*:*:*:*:*

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
22.40%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.2240 is in the 97th 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

No media coverage found for this CVE.

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

code610.blogspot.com / 2019/12/postauth-rce-in-latest-nagiosxi.html
ExploitThird Party Advisory