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CVE-2020-28909

27
FAUCET Score

CVE-2020-28909 describes a privilege escalation vulnerability in Nagios Fusion 4.1.8 and earlier, stemming from incorrect file permissions that allow low-privilege users to modify scripts executed by sudo. This flaw carries a high CVSS score of 8.8, indicating a network-based attack with low complexity that can lead to full compromise (confidentiality, integrity, and availability). While the vulnerability has a high FAUCET Risk Score, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.1.8CPE matchmatch criteria
cpe:2.3:a:nagios:fusion:*:*:*:*:*:*:*:*

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
5.13%
Probability of exploitation in next 30 days
EPSS Percentile
91.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0513 is in the 91st 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

packetstormsecurity.com / files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html
Third Party AdvisoryVDB Entry
skylightcyber.com / 2021/05/20/13-nagios-vulnerabilities-7-will-shock-you
ExploitThird Party Advisory
nagios.com / downloads/nagios-xi/change-log
Release NotesVendor Advisory