How severe is CVE-2023-0440?

CVE-2023-0440 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-0440 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0440?

CVE-2023-0440 affects Healthchecks. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0440?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-0440 published?

CVE-2023-0440 was published on 2023-01-23 and last updated on 2026-06-17.

CVE-2023-0440

CVE-2023-0440 is a medium-severity vulnerability in Healthchecks with a CVSS 3.x base score of 5.3. 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Healthchecks
Published: 2023-01-23
Last modified: 2026-06-17

Description

Observable Discrepancy in GitHub repository healthchecks/healthchecks prior to v2.6.

Frequently asked questions

What is CVE-2023-0440?: Observable Discrepancy in GitHub repository healthchecks/healthchecks prior to v2.6.
How severe is CVE-2023-0440?: CVE-2023-0440 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-0440 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0440?: CVE-2023-0440 affects Healthchecks. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0440?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-0440 published?: CVE-2023-0440 was published on 2023-01-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:healthchecks:healthchecks:*:*:*:*:*:*:*:*

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