CVE-2025-58121 | Insufficient permission validation on multiple REST API endpoints

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

Published: 2025-11-18 Last update: 2025-11-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-58121 is rated Low Risk (23.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.04%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-58121

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-19 — 0.04% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-58121

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 4.0 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:L)
Limited integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.
Exploit maturity (threat) (E:X)
Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:X)
Not evaluated.
Recovery (supplemental) (R:X)
Not evaluated.
Value density (supplemental) (V:X)
Not evaluated.
Vulnerability response effort (supplemental) (RE:X)
Not evaluated.
Provider urgency (supplemental) (U:X)
Not evaluated.
 — — [email protected]
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.5 [email protected]

Weakness enumeration for CVE-2025-58121

OS Trackers for CVE-2025-58121

vendor priority summary link
ubuntu medium CVE-2025-58121 medium priority: Ubuntu including 1 source packages (check-mk), 7 status rows across 7 suites (bionic, jammy, noble, plucky, questing, upstream, xenial): DNE 4, needs-triage 3. https://ubuntu.com/security/CVE-2025-58121

Affected software / configurations for CVE-2025-58121

Vendor Product Version Raw CPE
checkmk checkmk >= 2.2.0, < 2.4.0 cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:-:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b1:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b2:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b3:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b4:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b5:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:b6:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p1:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p10:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p11:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p12:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p13:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p14:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p15:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p2:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p3:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p4:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p5:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p6:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p7:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p8:*:*:*:*:*:*
checkmk checkmk 2.4.0 cpe:2.3:a:checkmk:checkmk:2.4.0:p9:*:*:*:*:*:*

References for CVE-2025-58121

URL Tags
https://checkmk.com/werk/18983 Vendor Advisory
cvelogic Threat Intelligence