CVE-2021-3273

HIGHNVD 7.27.2—Elevated

7.2

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.

CVSS v3: 7.2
EG Score: 7.2(medium)
EPSS: 96.3%
KEV: Not listed

Published

February 25, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://gist.github.com/leommxj/93edce6f8572cefe79a3d7da4389374e
cve@mitrehttps://www.nagios.com/downloads/nagios-xi/change-log/
af854a3a-2127-422b-91ae-364da2661108https://gist.github.com/leommxj/93edce6f8572cefe79a3d7da4389374e
af854a3a-2127-422b-91ae-364da2661108https://www.nagios.com/downloads/nagios-xi/change-log/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-94Improper Control of Generation of Code (Code Injection)

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:45 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 20:26 UTCEG score recompute
2026-05-26 20:26 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-3273?

CVE-2021-3273 is a high vulnerability published on February 25, 2021. 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.

When was CVE-2021-3273 disclosed?

CVE-2021-3273 was first published in the National Vulnerability Database on February 25, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3273 actively exploited?

CVE-2021-3273 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3273?

CVE-2021-3273 has a CVSS v3 base score of 7.2 (NVD).

How do I remediate CVE-2021-3273?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3273, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-3273

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3273?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)