CVE-2023-2020

Unauthorized scheduling of downtimes via REST API

MEDIUM

4.3

CVSS Score

Published: April 18, 2023 at 11:09 AM UTC

Updated: June 17, 2026 at 05:51 AM UTC

1 product affected across 1 vendorCheckmk

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Severity

MEDIUM4.3

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Checkmk · Checkmk

95%

2.1.0 ≤ v ≤ 2.1.0p272.2.0 ≤ v ≤ 2.2.0b42.1.0 2.1.0 b1 2.1.0 b2 2.1.0 b3 2.1.0 b4 2.1.0 b5 2.1.0 b6 2.1.0 b7 2.1.0 b8 2.1.0 b9 2.1.0 p1 2.1.0 p10 2.1.0 p11 2.1.0 p12 2.1.0 p13 2.1.0 p14 2.1.0 p15 2.1.0 p16 2.1.0 p17 2.1.0 p18 2.1.0 p2 2.1.0 p20 2.1.0 p21 2.1.0 p22 2.1.0 p23 2.1.0 p24 2.1.0 p25 2.1.0 p26 2.1.0 p27 2.1.0 p3 2.1.0 p4 2.1.0 p5 2.1.0 p6 2.1.0 p7 2.1.0 p8 2.1.0 p9 2.2.0 2.2.0 b1 2.2.0 b2 2.2.0 b3 2.2.0 b4 2.2.0 i1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://checkmk.com/werk/13981

References (1)

Vendor Advisory

Source: [email protected]

https://checkmk.com/werk/13981

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMTribe29

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-280CWE-863

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