Critical severity9.8NVD Advisory· Published May 24, 2021· Updated Jun 17, 2026

CVE-2020-28900

Description

Insufficient Verification of Data Authenticity in Nagios Fusion 4.1.8 and earlier and Nagios XI 5.7.5 and earlier allows for Escalation of Privileges or Code Execution as root via vectors related to an untrusted update package to upgrade_to_latest.sh.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nagios/Fusion2 versions
cpe:2.3:a:nagios:fusion:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:nagios:fusion:*:*:*:*:*:*:*:*range: <=4.1.8
- (no CPE)range: <=4.1.8
Nagios/XI2 versions
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*range: <=5.7.5
- (no CPE)range: <=5.7.5
Nagios/Fusiondescription

Patches

Vulnerability mechanics

References

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

News mentions

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cvss	0.637
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000