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CVE-2023-22359

User-enumeration in RestAPI

4.3 Medium

CVE-2023-22359 is a medium vulnerability (CVSS 4.3) in Checkmk, published June 26, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 43rd percentile. No source names a fixed version.

What does this mean?
Severity
4.3 MediumCVSS 3.1, CVE List
Exploit chance
0.50%EPSS, 43rd percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
No fix listedNo source names one

Description

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.50%Up 0.5 points since Jun 26, 2023
90%50%10%1%

Affected products

Affected packages

Affected packages
PackageAffectedFixed
check-mk
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
1.2.6p5-11.2.6p12-11.2.6p12-1ubuntu0.16.04.11.2.6p12-1ubuntu0.16.04.1+esm1
None known
check-mk
Ubuntu:18.04:LTS
All versions, plus listed versions
1.2.8p16-1ubuntu0.11.2.8p16-1ubuntu0.2
None known

What each source reports

CVE List Score used4.3

User-enumeration in RestAPI

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
CVE-2023-22359
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02
EUVDEUVD-2023-265224.3

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
EUVD-2023-26522
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-r33q-ccvx-f3w84.3

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
GHSA-r33q-ccvx-f3w8
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-200, CWE-203
Updated
2026-11-02
NVD4.3

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
CVE-2023-22359
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02
OSV4.3

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
CVE-2023-22359
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2023-223594.3

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Record
UBUNTU-CVE-2023-22359
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02

History

History
RecordedChangedSources
aliases, products, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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