How severe is CVE-2023-22963?

CVE-2023-22963 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 none, integrity low, and availability none.

Is CVE-2023-22963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22963?

CVE-2023-22963 affects Personnummer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-22963?

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

When was CVE-2023-22963 published?

CVE-2023-22963 was published on 2023-01-11 and last updated on 2026-06-17.

CVE-2023-22963

CVE-2023-22963 is a medium-severity vulnerability in Personnummer 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Personnummer
Published: 2023-01-11
Last modified: 2026-06-17

Description

The personnummer implementation before 3.0.3 for Dart mishandles numbers in which the last four digits match the ^000[0-9]$ regular expression.

Frequently asked questions

What is CVE-2023-22963?: The personnummer implementation before 3.0.3 for Dart mishandles numbers in which the last four digits match the ^000[0-9]$ regular expression.
How severe is CVE-2023-22963?: CVE-2023-22963 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 none, integrity low, and availability none.
Is CVE-2023-22963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22963?: CVE-2023-22963 affects Personnummer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-22963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-22963 published?: CVE-2023-22963 was published on 2023-01-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:personnummer:personnummer:*:*:*:*:*:dart:*:*

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