CVE-2021-40904

Name: CVE-2021-40904
Creator: NVD / NIST
Published: 2022-03-25T23:15:08.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.76%

Last modified Jun 17, 2026

CVE-2021-40904 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a misconfiguration of the web-app Dokuwiki (installed by default), which allows embedded php code. As a result, remote code execution is achieved. EPSS estimates a 3.76% chance of exploitation in the next 30 days.

Description

The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a misconfiguration of the web-app Dokuwiki (installed by default), which allows embedded php code. As a result, remote code execution is achieved. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session by a user with the role of administrator.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

3.76%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-276

Affected Software

Vendor	Product	Versions
Checkmk	Checkmk	>= 1.5.0, < 1.6.0

References

http://checkmk.comProduct
https://github.com/Edgarloyola/CVE-2021-40904Exploit, Patch, Third Party Advisory
http://checkmk.comProduct
https://github.com/Edgarloyola/CVE-2021-40904Exploit, Patch, Third Party Advisory

Timeline

Published: Mar 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40904?

How severe is CVE-2021-40904?

CVE-2021-40904 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40904?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40904?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST