CVE-2023-2020: checkmk
CVSS: 4.3v3.1MediumModified
AliasesUBUNTU-CVE-2023-2020
Published 18-04-2023Last modified 05-02-2025
Vulnerability summary
CVE-2023-2020 is a medium (CVSS 4.3) vulnerability in checkmk. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.3% of scored vulnerabilities.
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)EPSS score
0.40%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 18-04-2023PublishedVulnerability first disclosed.
- 05-02-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 4.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
0.00 pp
From 0.40% on 20-09-2026
20-09-202620-10-2026
EPSS score0.40%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-280Improper Handling of Insufficient Permissions or PrivilegesThe product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state.
- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Affected systems
Checkmk1 product
- checkmkEOL2.1.0 | 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:b1 | 2.2.0:b2 | 2.2.0:b3 | 2.2.0:b4 | 2.2.0:i1
Tribe291 product
- checkmk≥ 2.2.0, ≤ 2.2.0b4 | ≥ 2.1.0, ≤ 2.1.0p27
Ubuntu1 product
- check-mkAll versions (No fix recorded)
3 vendors · 3 products