CVE-2025-58121

Q: How do I fix CVE-2025-58121?

Upgrade checkmk to 2.4.0 or later.

Q: Is CVE-2025-58121 being actively exploited?

Not that we know of. CVE-2025-58121 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.

Q: How severe is CVE-2025-58121?

CVE-2025-58121 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2025-58121 affect?

Published advisories record a fix for checkmk (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUM

5.4

CVSS v3

NVD

Description

Insufficient permission validation on multiple REST API endpoints in Checkmk 2.2.0, 2.3.0, and 2.4.0 before version 2.4.0p16 allows low-privileged users to perform unauthorized actions or obtain sensitive information

CWE-280Improper Handling of Insufficient Permissions

How to fix

Remediation Available

checkmkNVD

Affected:>= 2.2.0, < 2.4.0Fixed in:2.4.0CVE-2025-58121derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.20%probability of exploitation in 30 days

10thpercentile

Low risk: more likely to be exploited than 10% of all known CVEs.

References

Vendor Advisory1

checkmk.com

Related Vulnerabilities

Other CWE-280 (Improper Handling of Insufficient Permissions) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24116	Critical	9.8	28%	-	-
CVE-2026-20817	High	7.8	5.4%	-	Fix
CVE-2020-8219	High	7.2	2.2%	-	-
CVE-2012-4550	Medium	5.3	2.1%	-	-
CVE-2020-26195	Medium	5.3	1.8%	-	-
CVE-2021-38312	High	7.1	1.3%	-	-

Common questions

How do I fix CVE-2025-58121?

Upgrade checkmk to 2.4.0 or later.

Is CVE-2025-58121 being actively exploited?

Not that we know of. CVE-2025-58121 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.20% is the estimated probability that it will be exploited in the next 30 days. That is higher than 10% of all scored CVEs.

How severe is CVE-2025-58121?

CVE-2025-58121 has a CVSS v3 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-58121 affect?

Published advisories record a fix for checkmk (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2025-58121

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-24.