CVE-2023-2020 — Unauthorized scheduling of downtimes via REST API

Back Back to CVE browser

MEDIUM

Unauthorized scheduling of downtimes via REST API

Published Apr 18, 2023

4.3

MEDIUM

CVSS 3.1

EPSS 0.40%

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 products

Vendor Tribe29 Product Checkmk Default
unaffected
- Version
  2.1.0
  Status
  affected
  Constraints
  <=2.1.0p27
- Version
  2.2.0
  Status
  affected
  Constraints
  <=2.2.0b4

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Tribe29

Checkmk

unaffected

Version	Status	Constraints
2.1.0	affected	<=2.1.0p27
2.2.0	affected	<=2.2.0b4

Remediation

No remediation recorded yet.

Metrics

0.40% 0.00405

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00405

Score over time

2023–2026

EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v3
EPSS v4
EPSS v5

Table of values (7 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.40% (0.00405)	32.37th	v5 (v2026.06.15)
Jun 15, 2026	0.40% (0.00402)	31.71th	v5 (v2026.06.15)
Mar 17, 2025	0.10% (0.00102)	25.63th	v4 (v2025.03.14)
Dec 12, 2024	0.05% (0.00049)	20.24th	v3 (v2023.03.01)
Apr 24, 2024	0.05% (0.00047)	16.04th	v3 (v2023.03.01)
Apr 28, 2023	0.04% (0.00045)	11.93th	v3 (v2023.03.01)
Apr 19, 2023	0.04% (0.00043)	7.02th	v3 (v2023.03.01)