Arbitrary file upload in Nagios Xi
CVE-2021-40344
An issue was discovered in Nagios XI 5.8.5. In the Custom Includes section of the Admin panel, an administrator can upload files with arbitrary extensions as long as the MIME type corresponds to an image. Therefore it is possible to upload a crafted PHP script to achieve remote command execution.
Vulnerability class: Unrestricted File Upload
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.648 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.648 · newest: 0.648 · change: 0.000
Affected products
- Nagios Xi — versions 5.8.5
Weakness classification (CWE)
References
- assets.nagios.com/downloads/nagiosxi/CHANGES-5.TXT (Release Notes, Vendor Advisory)
- synacktiv.com (Not Applicable)
- www.synacktiv.com/sites/default/files/2021-10/Nagios_XI_multiple_vulnerabilitie… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-40344?
- CVE-2021-40344 is a high-severity vulnerability in Nagios Xi, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2021-10-26.
- How severe is CVE-2021-40344?
- High severity. CVSS v3 base score is 7.2 out of 10.