CVE-2021-40344 is a critical arbitrary file upload vulnerability affecting Nagios XI version 5.8.5. An authenticated administrator can bypass file extension restrictions in the Custom Includes section by manipulating the MIME type, allowing the upload of malicious PHP scripts. This flaw carries a high CVSS score of 7.2, indicating that an attacker can achieve remote command execution with high impact on confidentiality, integrity, and availability. Despite its severity and high EPSS score, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.8.5CPE matchmatch criteria | cpe:2.3:a:nagios:nagios_xi:5.8.5:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.