Cross-site request forgery in kimai2 - CVE-2026-52823
Published: June 29, 2026
Vulnerability identifier: #VU135845
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52823
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kevin Papst
Affected software:
kimai2
kimai2
Detailed vulnerability description
The vulnerability allows a remote user to cause unauthorized timesheet state changes.
The vulnerability exists due to cross-site request forgery in src/API/TimesheetController.php when handling state-changing /api/timesheets/{id}/stop and /api/timesheets/{id}/restart requests through browser-authenticated sessions. A remote user can trick the victim into visiting a malicious page to cause unauthorized timesheet state changes.
User interaction is required, and the victim must be logged in for exploitation to succeed.
How to mitigate CVE-2026-52823
Install security update from vendor's website.