CVE-2021-3273

Nagios Xi vulnerability

CVSS

7.2

EPSS

7.2%

EPSS pct

94th

Exploited

No known

Nagios XI below 5.7 is affected by code injection in the /nagiosxi/admin/graphtemplates.php component. To exploit this vulnerability, someone must have an admin user account in Nagios XI's web system.

Affected vendor

Nagios

Affected product

Nagios Xi

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-94 — Code Injection

Published

2021-02-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring high privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 7.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2021-3273

Confirm whether Nagios Nagios Xi is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-3273.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-3273

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-3273 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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