What’s Vulnerable › Vulnerabilities

CVE-2020-28900

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-24 · updated 2026-06-17
• Weakness: CWE-345

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.

Affected products

• Nagios Fusion: through 4.1.8
• Nagios XI: through 5.7.5

References

• http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html
• https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/
• https://www.nagios.com/downloads/nagios-xi/change-log/
• http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html
• https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/
• https://www.nagios.com/downloads/nagios-xi/change-log/

Get alerted when CVE-2020-28900 or the next vulnerability affects your stack