Kimai is an open-source time tracking application. Prior to 2.58.0, TimesheetController exposes GET /api/timesheets/{id}/stop and GET /api/timesheets/{id}/restart, which reuse an authenticated browser session and perform state-changing operations through GET requests without a request-forgery defense. A remote attacker can cause a logged-in user to request either route from attacker-controlled content, stopping a running timesheet or restarting a historical entry to create and start a new timesheet without the user's consent.
The unauthorized changes can corrupt time records, billing, reports, approvals, and audits. This issue is fixed in version 2.58.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/kimai/kimai/commit/31a8f887a5cda517db7b4320a7ad997c87d08601
security-advisories@github.com
https://github.com/kimai/kimai/pull/5952
security-advisories@github.com
https://github.com/kimai/kimai/releases/tag/2.58.0
security-advisories@github.com
https://github.com/kimai/kimai/security/advisories/GHSA-r8vr-m544-qh4h
security-advisories@github.com
https://www.kimai.org/en/security/ghsa-r8vr-m544-qh4h
security-advisories@github.com