Arbitrary file upload in Checkmk
CVE-2021-40905
The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does not properly sanitise the uploading of ".mkp" files, which are Extension Packages, making remote code execution possible. Successful exploitation req…
Vulnerability class: Unrestricted File Upload
EPSS: 0.028 (85.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Checkmk — versions 2.0.0
- Tribe29 Checkmk
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- af854a3a-2127-422b-91ae-364da2661108 (Product, x_refsource_MISC)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org
Frequently asked questions
- What is CVE-2021-40905?
- CVE-2021-40905 is a high-severity vulnerability in Checkmk, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-03-25.
- How severe is CVE-2021-40905?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-40905 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.