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TI-2023-01897 Aliases CVE-2023-2020GHSA-w7j6-p4c4-j78m

Unauthorized scheduling of downtimes via REST API

Priority LOW 20CWE-280Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00405 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Tribe29Checkmk2.2.0 – 2.2.0b4; 2.1.0 – 2.1.0p27—No fix listedCNA
  • Checkmk VendorTribe29 Affected 2.2.0 – 2.2.0b4; 2.1.0 – 2.1.0p27 Fixed in — No fix listed CNA

CPE configurations NVD · 41

CPEVersionsRoleVendor
cpe:2.3:a:checkmk:checkmk:2.1.0:-:*:*:*:*:*:*2.1.0VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b1:*:*:*:*:*:*2.1.0 b1VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b2:*:*:*:*:*:*2.1.0 b2VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b3:*:*:*:*:*:*2.1.0 b3VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b4:*:*:*:*:*:*2.1.0 b4VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b5:*:*:*:*:*:*2.1.0 b5VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b6:*:*:*:*:*:*2.1.0 b6VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b7:*:*:*:*:*:*2.1.0 b7VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b8:*:*:*:*:*:*2.1.0 b8VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:b9:*:*:*:*:*:*2.1.0 b9VulnerableCheckmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:-:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b1:*:*:*:*:*:* Versions 2.1.0 b1 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b2:*:*:*:*:*:* Versions 2.1.0 b2 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b3:*:*:*:*:*:* Versions 2.1.0 b3 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b4:*:*:*:*:*:* Versions 2.1.0 b4 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b5:*:*:*:*:*:* Versions 2.1.0 b5 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b6:*:*:*:*:*:* Versions 2.1.0 b6 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b7:*:*:*:*:*:* Versions 2.1.0 b7 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b8:*:*:*:*:*:* Versions 2.1.0 b8 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:b9:*:*:*:*:*:* Versions 2.1.0 b9 Vulnerable ·Checkmk GmbH
Show 31 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:checkmk:checkmk:2.1.0:p1:*:*:*:*:*:*2.1.0 p1VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p10:*:*:*:*:*:*2.1.0 p10VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p11:*:*:*:*:*:*2.1.0 p11VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p12:*:*:*:*:*:*2.1.0 p12VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p13:*:*:*:*:*:*2.1.0 p13VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p14:*:*:*:*:*:*2.1.0 p14VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p15:*:*:*:*:*:*2.1.0 p15VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p16:*:*:*:*:*:*2.1.0 p16VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p17:*:*:*:*:*:*2.1.0 p17VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p18:*:*:*:*:*:*2.1.0 p18VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p2:*:*:*:*:*:*2.1.0 p2VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p20:*:*:*:*:*:*2.1.0 p20VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p21:*:*:*:*:*:*2.1.0 p21VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p22:*:*:*:*:*:*2.1.0 p22VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p23:*:*:*:*:*:*2.1.0 p23VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p24:*:*:*:*:*:*2.1.0 p24VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p25:*:*:*:*:*:*2.1.0 p25VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p26:*:*:*:*:*:*2.1.0 p26VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p27:*:*:*:*:*:*2.1.0 p27VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p3:*:*:*:*:*:*2.1.0 p3VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p4:*:*:*:*:*:*2.1.0 p4VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p5:*:*:*:*:*:*2.1.0 p5VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p6:*:*:*:*:*:*2.1.0 p6VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p7:*:*:*:*:*:*2.1.0 p7VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p8:*:*:*:*:*:*2.1.0 p8VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.1.0:p9:*:*:*:*:*:*2.1.0 p9VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:*2.2.0 b1VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.2.0:b2:*:*:*:*:*:*2.2.0 b2VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.2.0:b3:*:*:*:*:*:*2.2.0 b3VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.2.0:b4:*:*:*:*:*:*2.2.0 b4VulnerableCheckmk GmbH
cpe:2.3:a:checkmk:checkmk:2.2.0:i1:*:*:*:*:*:*2.2.0 i1VulnerableCheckmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p1:*:*:*:*:*:* Versions 2.1.0 p1 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p10:*:*:*:*:*:* Versions 2.1.0 p10 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p11:*:*:*:*:*:* Versions 2.1.0 p11 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p12:*:*:*:*:*:* Versions 2.1.0 p12 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p13:*:*:*:*:*:* Versions 2.1.0 p13 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p14:*:*:*:*:*:* Versions 2.1.0 p14 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p15:*:*:*:*:*:* Versions 2.1.0 p15 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p16:*:*:*:*:*:* Versions 2.1.0 p16 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p17:*:*:*:*:*:* Versions 2.1.0 p17 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p18:*:*:*:*:*:* Versions 2.1.0 p18 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p2:*:*:*:*:*:* Versions 2.1.0 p2 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p20:*:*:*:*:*:* Versions 2.1.0 p20 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p21:*:*:*:*:*:* Versions 2.1.0 p21 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p22:*:*:*:*:*:* Versions 2.1.0 p22 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p23:*:*:*:*:*:* Versions 2.1.0 p23 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p24:*:*:*:*:*:* Versions 2.1.0 p24 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p25:*:*:*:*:*:* Versions 2.1.0 p25 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p26:*:*:*:*:*:* Versions 2.1.0 p26 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p27:*:*:*:*:*:* Versions 2.1.0 p27 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p3:*:*:*:*:*:* Versions 2.1.0 p3 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p4:*:*:*:*:*:* Versions 2.1.0 p4 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p5:*:*:*:*:*:* Versions 2.1.0 p5 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p6:*:*:*:*:*:* Versions 2.1.0 p6 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p7:*:*:*:*:*:* Versions 2.1.0 p7 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p8:*:*:*:*:*:* Versions 2.1.0 p8 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.1.0:p9:*:*:*:*:*:* Versions 2.1.0 p9 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.2.0:b1:*:*:*:*:*:* Versions 2.2.0 b1 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.2.0:b2:*:*:*:*:*:* Versions 2.2.0 b2 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.2.0:b3:*:*:*:*:*:* Versions 2.2.0 b3 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.2.0:b4:*:*:*:*:*:* Versions 2.2.0 b4 Vulnerable ·Checkmk GmbH
  • cpe:2.3:a:checkmk:checkmk:2.2.0:i1:*:*:*:*:*:* Versions 2.2.0 i1 Vulnerable ·Checkmk GmbH

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-2020
  2. 2026-10-03 Alias added: GHSA-w7j6-p4c4-j78m

References

Advisory 1

  • TI-2021-17818 The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does… CVSS 3.1HIGH 8.8
  • TI-2023-14915 Command injection via active checks and REST API CVSS 3.1HIGH 8.8
  • TI-2022-23931 Insecure Termination of RestAPI Session Tokens CVSS 3.1CRITICAL 9.8
  • TI-2022-23182 Improper input validation in Tribe29 Checkmk CVSS 3.1CRITICAL 9.1
  • TI-2023-14914 Livestatus command injection in RestAPI CVSS 3.1HIGH 8.8
  • TI-2023-08583 Denial of service against webconf CVSS 3.1HIGH 7.5
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences