Time Sheets < 1.29.3 - Admin+ Stored XSS

The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

PoC

1. Login as Admin. 2. Go to https://example.com/wp-admin/admin.php?page=time_sheets_settings 3. Insert the payload '> in the field Email address to email when a project is over on hours: 4. Click on save changes and XSS payload will be stored and triggered.