# CVE-2023-53957: Kimai contains a SameSite cookie vulnerability

Source: https://junglewise.ai/threats/cve-2023-53957-kimai-contains-a-samesite-cookie-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-19  
License: CC BY 4.0 with a link back

CVE-2023-53957 · Severity: critical · CVSS 9.8 · Published 2025-12-19

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.

Technologies: [Kimai](https://junglewise.ai/threats/technologies/kimai), [kimai/kimai (Packagist)](https://junglewise.ai/threats/technologies/kimai-kimai). Vendors: [Kimai](https://junglewise.ai/threats/vendors/kimai), [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2023-53957 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-53957 being exploited in the wild.

**How severe is CVE-2023-53957?** Critical severity, with a CVSS score of 9.8, published 19 December 2025.

**Which products and versions are affected?** kimai/kimai (Packagist) ECOSYSTEM:introduced=0,last_affected=1.30.10.

**Is there a fix for CVE-2023-53957?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2023-53957?** Check whether you run Kimai or kimai/kimai (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Kimai
- kimai/kimai (Packagist) ECOSYSTEM:introduced=0,last_affected=1.30.10

## Identifiers

- CVE-2023-53957
- GHSA-cv8h-r7r5-vwj9

## Related threats

- [Kimai missing authorization check in ExportController export templates](https://junglewise.ai/threats/cve-2026-52828-kimai-missing-authorization-check-in-exportcontroller-export)
- [Kimai 2FA bypass in REST API via session cookie replay](https://junglewise.ai/threats/cve-2026-52827-kimai-2fa-bypass-in-rest-api-via-session-cookie-replay)
- [Kimai improper authorization in rate edit endpoints](https://junglewise.ai/threats/cve-2026-52826-kimai-improper-authorization-in-rate-edit-endpoints)
- [Kimai improper authorization in Team assignment APIs](https://junglewise.ai/threats/cve-2026-52825-kimai-improper-authorization-in-team-assignment-apis)
- [Kimai insecure default APP_SECRET in Docker image](https://junglewise.ai/threats/cve-2026-52824-kimai-insecure-default-app-secret-in-docker-image)