CVE-2021-3957

MEDIUMNVD 4.34.3—

4.3

kimai2 is vulnerable to Cross-Site Request Forgery (CSRF)

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 25.2%
KEV: Not listed

Published

November 19, 2021

Last Modified

November 21, 2024

References (4)

security@huntrhttps://github.com/kevinpapst/kimai2/commit/6b49535b523dcd36ec59462ee4e67e2b3a9151f3
security@huntrhttps://huntr.dev/bounties/5fa3098a-ba02-45e0-af56-645e34dbc691
af854a3a-2127-422b-91ae-364da2661108https://github.com/kevinpapst/kimai2/commit/6b49535b523dcd36ec59462ee4e67e2b3a9151f3
af854a3a-2127-422b-91ae-364da2661108https://huntr.dev/bounties/5fa3098a-ba02-45e0-af56-645e34dbc691

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
kevinpapst/kimai2	0.1 ... 1.9 (44 versions)	1.16	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-352Cross-Site Request Forgery (CSRF)

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:20 UTCEG score recompute
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-3957?

CVE-2021-3957 is a medium vulnerability published on November 19, 2021. kimai2 is vulnerable to Cross-Site Request Forgery (CSRF)

When was CVE-2021-3957 disclosed?

CVE-2021-3957 was first published in the National Vulnerability Database on November 19, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3957 actively exploited?

CVE-2021-3957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3957?

CVE-2021-3957 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2021-3957?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3957, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-3957

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Is Your Infrastructure Affected by CVE-2021-3957?

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