CVE-2023-53957 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking
Attackers can hijack user sessions in Kimai by exploiting missing SameSite cookie protections, allowing unauthorized access to victim accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-53957?
CVE-2023-53957 is a high-severity vulnerability in Kimai, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-1275
Which versions are affected by CVE-2023-53957?
2 open source packages ship an affected version, including kimai/kimai. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
kimai/kimai Packagist | All versions to 1.30.10 | None |
kimai/kimai Packagist | All versions to 1.30.10 | None |
Products include Kimai Kimai.
How do I fix CVE-2023-53957?
No fix has been published for CVE-2023-53957 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-53957 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-53957 exists.
Other vulnerabilities in Kimai
- CVE-2020-19825 Cross-site Scripting in kimai/kimai
- CVE-2021-43515 Improper Neutralization of Formula Elements in a CSV File in Kimai 2
- CVE-2023-46245 Kimai (Authenticated) SSTI to RCE by Uploading a Malicious Twig File
- CVE-2026-23626 Kimai Vulnerable to Authenticated Server-Side Template Injection (SSTI)
- CVE-2024-29200 API returns timesheet entries a user should not be authorized to view
Sources
Also known as GHSA-cv8h-r7r5-vwj9.