What is CVE-2021-3277?

CVE-2021-3277 is a high-severity vulnerability in Nagios Nagios_xi, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2021-06-07.

How severe is CVE-2021-3277?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2021-3277 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Nagios Nagios_xi

CVE-2021-3277

Nagios XI 5.7.5 and earlier allows authenticated admins to upload arbitrary files due to improper validation of the rename functionality in custom-includes component, which leads to remote code execution by uploading php files.

Vulnerability class: Unrestricted File Upload

EPSS: 0.546 (98.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nagios Nagios_xi
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

n0-traces/cve_

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3277?: CVE-2021-3277 is a high-severity vulnerability in Nagios Nagios_xi, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2021-06-07.
How severe is CVE-2021-3277?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2021-3277 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.