Authentication Bypass

Kimai is vulnerable to Authentication Bypass. The vulnerability is due to the REST API accepting the KIMAISESSION cookie as authenticated before TOTP verification is completed, which allows an attacker with a valid account password to bypass two-factor authentication and access protected API...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization through insufficient authorization checks in the postMemberAction and postActivityAction API endpoints. An attacker can expand their management scope to add users or activities outside their authorized visibility b...

Authorization Bypass Through User-Controlled Key

Overview Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key in the PATCH /api/timesheets/id and POST /api/timesheets endpoints, which accept a user-supplied project ID that is resolved through a query builder allowing the submitted ID to bypass...

Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Summary Kimai 2.56.0 contains a server-side request forgery vulnerability in its invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as Customer.invoiceText, the server-side PDF renderer will fetch remote image...

Weak Password Recovery Mechanism for Forgotten Password

Overview Affected versions of this package are vulnerable to Weak Password Recovery Mechanism for Forgotten Password through the loginlink process. An attacker can gain unauthorized access to user accounts by reusing a previously issued password reset link after the password has been changed. Thi...

Kimai has Missing Voter Check that Allows Cross-Team Timesheet Manipulation

Summary Any ROLETEAMLEAD user can enumerate, read, modify, and permanently delete timesheets belonging to any other user in the system — regardless of team membership. This enables data destruction deleted billable hours, data tampering forged timesheet durations, and full authorization bypass on...

Kimai has Stored XSS via Incomplete HTML Attribute Escaping in Team Member Widget

Summary The client-side escapeForHtml function in KimaiEscape.js, introduced in commit 89bfa82c 2959 to fix a JavaScript XSS vulnerability, only escapes , and & but does not escape " double quote or ' single quote. When user-controlled data profile alias is placed in an HTML attribute context...

PT-2026-33218

Name of the Vulnerable Software and Affected Versions Kimai versions prior to 2.53.0 Description A Mass Assignment and Broken Object Property Level Authorization issue exists in the User Preferences API. The endpoint '/api/users/id/preferences' fails to check the isEnabled flag on preference...

Incomplete List of Disallowed Inputs

Overview Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs in the getApiToken method when rendering invoice templates via the Twig sandbox environment. An attacker can access hashed API tokens of users by embedding calls to this method in a custom invoice...

CVE-2026-23626

Kimai (time-tracking app) before v2.46.0 is vulnerable to an authenticated SSTI via the export template sandbox. The export policy uses DefaultPolicy, which imposes no restrictions on Twig tags, methods, or properties, allowing an attacker with export permissions to deploy a malicious Twig templa...

CVE-2023-53957

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...

EUVD-2024-1456

Malicious code in bioql PyPI...

CVE-2024-4596

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 ...

CVE-2023-46245

Kimai is a web-based multi-user time-tracking application. Versions prior to 2.1.0 are vulnerable to a Server-Side Template Injection SSTI which can be escalated to Remote Code Execution RCE. The vulnerability arises when a malicious user uploads a specially crafted Twig file, exploiting the...

CVE-2021-43515

CSV Injection aka Excel Macro Injection or Formula Injection exists in creating new timesheet in Kimai. By filling the Description field with malicious payload, it will be mistreated while exporting to a CSV file...

Insufficient Access Control

Kimai is vulnerable to Insufficient Granularity of Access Control. This vulnerability is due to the viewothertimesheet permission between the UI and API performing differently, leading to unauthorized access to timesheet entries...