What is CVE-2021-40904?

CVE-2021-40904 is a high-severity vulnerability in Checkmk, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2022-03-25.

How severe is CVE-2021-40904?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-40904 known to be exploited?

9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Checkmk

CVE-2021-40904

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.

EPSS: 0.035 (87.8th 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
N/a — versions n/a

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

References

af854a3a-2127-422b-91ae-364da2661108 (Product, x_refsource_MISC)
cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-40904?: CVE-2021-40904 is a high-severity vulnerability in Checkmk, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2022-03-25.
How severe is CVE-2021-40904?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-40904 known to be exploited?: 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.