CVE-2021-40905: checkmk

Vulnerability summary

CVE-2021-40905 is a high (CVSS 8.8) vulnerability in checkmk. EPSS estimates a 3.03% chance of exploitation in the next 30 days, higher than 87.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 25-03-2022
   PublishedVulnerability first disclosed.
2. 09-07-2026
   Last modifiedVulnerability information updated.

Description

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 requires access to the web management interface, either with valid credentials or with a hijacked session of a user with administrator role. NOTE: the vendor states that this is the intended behavior: admins are supposed to be able to execute code in this manner.

• CWE-434Unrestricted Upload of File with Dangerous TypeThe product allows the upload or transfer of dangerous file types that are automatically processed within its environment.