Vulnerability Monitor

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CVE-2020-28900

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.

Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 2 products from nagios, from nagios organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-05-24T13:15:07.617

Last Modified

2024-11-21T05:23:15.077

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

10.0

Weaknesses

Type: Primary
CWE-345

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	nagios	fusion	≤ 4.1.8	Yes
Application	nagios	nagios_xi	≤ 5.7.5	Yes

References

http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html Third Party Advisory, VDB Entry ([email protected])
https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/ Exploit, Third Party Advisory ([email protected])
https://www.nagios.com/downloads/nagios-xi/change-log/ Release Notes, Vendor Advisory ([email protected])
http://packetstormsecurity.com/files/162783/Nagios-XI-Fusion-Privilege-Escalation-Cross-Site-Scripting-Code-Execution.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://skylightcyber.com/2021/05/20/13-nagios-vulnerabilities-7-will-shock-you/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.nagios.com/downloads/nagios-xi/change-log/ Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For nagios's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.