How severe is CVE-2023-31211?

CVE-2023-31211 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-31211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31211?

CVE-2023-31211 primarily affects Checkmk. In total, 118 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-31211?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-31211 have an EU (EUVD) identifier?

Yes. CVE-2023-31211 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35526.

When was CVE-2023-31211 published?

CVE-2023-31211 was published on 2024-01-12 and last updated on 2026-06-17.

CVE-2023-31211

CVE-2023-31211 is a high-severity vulnerability in Checkmk with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-670.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-35526
Weakness: CWE-670
Affected product: Checkmk
Published: 2024-01-12
Last modified: 2026-06-17

Description

Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials

Frequently asked questions

What is CVE-2023-31211?: Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials
How severe is CVE-2023-31211?: CVE-2023-31211 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-31211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31211?: CVE-2023-31211 primarily affects Checkmk. In total, 118 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-31211?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-31211 have an EU (EUVD) identifier?: Yes. CVE-2023-31211 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35526.
When was CVE-2023-31211 published?: CVE-2023-31211 was published on 2024-01-12 and last updated on 2026-06-17.

References

https://checkmk.com/werk/16227

Affected products (118)

cpe:2.3:a:checkmk:checkmk:2.0.0:b1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b4:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b5:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b6:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b7:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:b8:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:i1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p1:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p10:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p11:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p12:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p13:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p14:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p15:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p16:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p17:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p18:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p19:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p2:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p20:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p21:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p22:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p23:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p24:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p25:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p26:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p27:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p28:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p29:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p3:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p30:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p31:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p32:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p33:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p34:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p35:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p36:*:*:*:*:*:*
cpe:2.3:a:checkmk:checkmk:2.0.0:p37:*:*:*:*:*:*

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