How severe is CVE-2021-3992?

CVE-2021-3992 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-3992 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3992?

CVE-2021-3992 affects Kimai2 Project Kimai2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3992?

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

When was CVE-2021-3992 published?

CVE-2021-3992 was published on 2021-12-01 and last updated on 2026-06-17.

CVE-2021-3992

CVE-2021-3992 is a medium-severity vulnerability in Kimai2 Project Kimai2 with a CVSS 3.x base score of 6.5. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Kimai2 Project Kimai2
Published: 2021-12-01
Last modified: 2026-06-17

Description

kimai2 is vulnerable to Improper Access Control

Frequently asked questions

What is CVE-2021-3992?: kimai2 is vulnerable to Improper Access Control
How severe is CVE-2021-3992?: CVE-2021-3992 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-3992 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3992?: CVE-2021-3992 affects Kimai2 Project Kimai2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3992?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3992 published?: CVE-2021-3992 was published on 2021-12-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kimai2_project:kimai2:*:*:*:*:*:*:*:*

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