# CVE-2023-53957: Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking

Status: published. Published: 2025-12-19. Updated: 2026-11-08.

Kimai 1.30.10 contains a SameSite cookie vulnerability that allows attackers to steal user session cookies through malicious exploitation. Attackers can trick victims into executing a crafted PHP script that captures and writes session cookie information to a file, enabling potential session hijacking.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Kimai / Kimai (kimai/kimai): 1.30.10 (affected). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.5 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.59% as of 2026-11-08; percentile 48.58%

- SSVC: exploitation poc; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-1275

## Exploit evidence

- exploit: https://www.exploit-db.com/exploits/51278 (CNA: VulnCheck)

## References

- https://www.exploit-db.com/exploits/51278 (CNA: VulnCheck; exploit)

- https://github.com/kimai/kimai/releases/tag/1.30.10 (CNA: VulnCheck; product, release-notes)

- https://www.vulncheck.com/advisories/kimai-samesite-cookie-vulnerability-session-hijacking (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2023-53957; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2023-53957; retrieved 2026-11-08; source updated Not reported

Revision: 221b262a0370af7c5f07f499fec4d3c1c7009ab4c6916d3ccf7f6a1f0b3cff84

Canonical: https://y2.dev/cve/CVE-2023-53957

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