SB2026081945 - Multiple vulnerabilities in kimai2

Description

This security bulletin contains information about 2 vulnerabilities.

1) Incorrect authorization (CVE-ID: N/A)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: 7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper authorization in the default team creation API endpoints when creating or reusing a project, customer, or activity team whose name matches an existing team. A remote user can create or use a project whose name matches an existing team to escalate privileges.

Exploitation requires project permission-management privileges, and the issue occurs because an existing team is reused and the current user is added as a teamlead without authorization checks.

2) Incorrect authorization (CVE-ID: N/A)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in the GET /api/timesheets endpoint when listing timesheet records via the REST API. A remote user can send a request to list timesheets belonging to other users to disclose sensitive information.

Exploitation requires the view_other_timesheet permission and installations that use team-restricted activities.

Remediation

Install update from vendor's website.

References

• https://github.com/kimai/kimai/security/advisories/GHSA-hvq2-5gh2-rgvv
• https://github.com/kimai/kimai/security/advisories/GHSA-c6j4-35fc-x3hw