CVE-2023-2020

Name: CVE-2023-2020
Creator: NVD / NIST
Published: 2023-04-18T12:15:07.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2023-2020 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Insufficient permission checks in the REST API in Tribe29 Checkmk <= 2.1.0p27 and <= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

Insufficient permission checks in the REST API in Tribe29 Checkmk <= 2.1.0p27 and <= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.40%

32.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Checkmk	Checkmk	2.1.0	—
Checkmk	Checkmk	2.2.0	B1

References

https://checkmk.com/werk/13981Vendor Advisory
https://checkmk.com/werk/13981Vendor Advisory

Timeline

Published: Apr 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2020?

Insufficient permission checks in the REST API in Tribe29 Checkmk <= 2.1.0p27 and <= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.

How severe is CVE-2023-2020?

CVE-2023-2020 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2020?

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-2023-2020?

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

Scan your code now

Source: NVD / NIST