Kimai 2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts into timesheet descriptions. Attackers can insert SVG-based XSS payloads in the description field to execute arbitrary JavaScript when the page is loaded and viewed by other users.

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.

An unauthenticated SQL injection vulnerability exists in Kimai version 0.9.2.x via the db_restore.php endpoint. The flaw allows attackers to inject arbitrary SQL queries into the dates[] POST parameter, enabling file write via INTO OUTFILE under specific environmental conditions. This can lead to remote code execution by writing a PHP payload to the web-accessible temporary directory. The vulnerability has been confirmed in versions including 0.9.2.beta, 0.9.2.1294.beta, and 0.9.2.1306-3.

A vulnerability was found in Kimai up to 2.15.0 and classified as problematic. Affected by this issue is some unknown functionality of the component Session Handler. The manipulation of the argument PHPSESSIONID leads to information disclosure. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 2.16.0 is able to address this issue. It is recommended to upgrade the affected component. VDB-263318 is the identifier assigned to this vulnerability.