CVE-2020-28907

Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier allows for Escalation of...

9.8 Critical

Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier allows for Escalation of Privileges or Code Execution as root via vectors related to download of an untrusted update package in upgrade_to_latest.sh.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.50%Up 3.4 points since May 25, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2020-28907
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-295
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-28907
Updated: 2026-11-02

EUVDEUVD-2020-21298 No score

Record: EUVD-2020-21298
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7x92-q8cg-wfh6 No score

Incorrect SSL certificate validation in Nagios Fusion 4.1.8 and earlier allows for Escalation of...

Record: GHSA-7x92-q8cg-wfh6
Weakness: CWE-295
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-2020-28907 is a critical vulnerability (CVSS 9.8) 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 4.50%, the 91st percentile. No source names a fixed version.