CVE-2020-28909

Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to...

8.8 High

Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root via modification of scripts. Low-privileges users are able to modify files that can be executed by sudo.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

6.75%Up 6.1 points since May 25, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2020-28909
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 9.0 HighAV:N/AC:L/Au:S/C:C/I:C/A:C
Weakness: CWE-732
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-28909
Updated: 2026-11-02

EUVDEUVD-2020-21300 No score

Record: EUVD-2020-21300
Updated: 2026-11-03

GitHub AdvisoriesGHSA-fj4q-mmcw-p43v No score

Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to...

Record: GHSA-fj4q-mmcw-p43v
Weakness: CWE-732
Updated: 2026-11-02

Affected products

nagios fusion

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-28909 is a high vulnerability (CVSS 8.8) in Nagios Fusion, published May 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 6.75%, the 94th percentile. No source names a fixed version.